IO Enhancement Sets
Reference Guide
Note: Sets marked ⭐ are widely considered
best-in-slot or highly recommended for most builds. Sets marked 🔴
are rare/expensive. ATOs = Archetype-specific sets. Superior
versions are level 50 upgrades of ATO sets.
How IO Sets Work
- Slot 2–6 IOs from the same set into a single
power to earn set bonuses
- Set bonuses are global — they apply to your
character at all times regardless of whether the power is used
-
Enhancement Diversification (ED): Diminishing
returns kick in past ~95% enhancement in a single stat — diversify
your slotting
-
Law of Fives: You can only benefit from 5 copies of
any single set bonus across your entire build
-
Attuned IOs level up with you and never go grey —
recommended for most slots
-
Superior ATOs are the best-in-slot versions but
cannot be attuned
IO Set Categories
Sets are organized by the power type they can be
slotted into. A set can only go in powers of its matching type.
🗡️ Melee Damage Sets
Powers that deal direct melee damage.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Kinetic Combat
| 35–50 | 4 | ⭐ Smashing/Lethal defense bonus
at 4-piece. Very popular on melee builds chasing S/L defense softcap. |
| Crushing Impact
| 20–50 | 6 | Solid all-around acc/dam/end/rech
set. Good budget melee choice. |
| Mako's Bite
| 20–50 | 6 | Ranged defense bonus at 6-piece.
Good for melee characters wanting ranged def. |
| Hecatomb
| 50 | 6 | 🔴 Rare set. Massive fire/cold
resistance at 3-piece. Top-end melee DPS set. |
| Titans' Revenge
| — | 6 | 🔴 ATOs for Scrapper. Superior
version gives Build Up proc. |
| Touch of Death
| 20–50 | 6 | Negative energy/toxic resistance
bonuses. Decent budget option. |
| Gladiator's Strike
| 50 | 6 | 🔴 Includes the +3% defense unique
(Gladiator's Armor is the defense version). |
| Superior Scrapper's Strike
| 50 | 6 | 🔴 Scrapper ATO. Proc gives Build Up
on critical hit. |
| Superior Brute's Fury
| 50 | 6 | 🔴 Brute ATO. Proc interacts with
Fury mechanic. |
| Superior Stalker's Guile
| 50 | 6 | 🔴 Stalker ATO. Proc activates on
Assassin's Strike. |
| Superior Tanker's Guarantee
| 50 | 6 | 🔴 Tanker ATO. |
🏹 Ranged Damage Sets
Powers that deal damage at range (single target).
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Thunderstrike
| 21–50 | 6 | ⭐ Ranged defense bonus. Most
popular ranged set for defense-building. |
| Decimation
| 20–50 | 6 | ⭐ Recharge bonus at 4-piece.
Includes the Chance for Build Up proc — fires
on every ranged attack use. |
| Entropic Chaos
| 10–20 | 6 | Budget ranged set for leveling. |
| Apocalypse
| 50 | 6 | 🔴 Rare. Top-end ranged set. Strong
proc and resistance bonuses. |
| Devastation
| 20–50 | 6 | HP/regen bonuses. Good if chasing
max HP build. |
| Defender's Bastion
| 50 | 6 | 🔴 Defender/Corruptor ATO. Proc
provides a team defense buff. |
| Superior Defender's Bastion
| 50 | 6 | 🔴 Enhanced version. |
| Blaster's Wrath
| 50 | 6 | 🔴 Blaster ATO. Proc adds damage boost. |
| Superior Blaster's Wrath
| 50 | 6 | 🔴 Enhanced version. |
💥 PBAoE Damage Sets
Point-blank area of effect damage powers (affects enemies around you).
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Armageddon
| 50 | 6 | 🔴 Rare. The premier PBAoE set.
Fire/cold resistance at 3-piece. Chance for Fire
Damage proc is excellent. |
| Obliteration
| 20–50 | 6 | ⭐ Melee defense bonus at 4–5
piece. Great budget PBAoE set. Very commonly used. |
| Multi-Strike
| 20–50 | 6 | Decent all-around set. Cheaper alternative. |
| Eradication
| 10–50 | 6 | Energy defense bonus at 4-piece.
Good for energy-heavy content. |
| Scirocco's Dervish
| 10–50 | 6 | AoE defense bonus. Budget AoE option. |
🎯 Targeted AoE Damage Sets
AoE attacks targeted on a location or specific enemy.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Ragnarok
| 50 | 6 | 🔴 Rare. Fire/cold resistance at
3-piece. Chance for Knockdown proc is widely used. |
| Positron's Blast
| 10–50 | 6 | ⭐ Fire/cold resistance at
3-piece. Very popular budget targeted AoE set. |
| Bombardment
| 10–50 | 6 | AoE defense bonus. Solid
all-around set. |
| Javelin Volley
| 10–50 | 6 | Ranged defense bonus. Good
alternative to Positron's. |
| Air Burst
| 10–50 | 6 | Knockback-based set. Less
commonly used. |
| Pounding Slugfest
| 10–20 | 6 | Budget leveling set. |
🏹 Sniper Attack Sets
Long-range sniper powers.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Sting of the Manticore
| 20–50 | 6 | ⭐ Ranged defense bonus. The go-to
sniper set. |
| Executioner's Contract
| 20–50 | 6 | Cold resistance bonus. Good
secondary sniper option. |
| Calibrated Accuracy
| 10–20 | 6 | Budget leveling sniper set. |
🛡️ Defense Sets
Powers that grant defense bonuses (toggles/clicks that improve your
defense stat).
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Luck of the Gambler
| 10–50 | 6 | ⭐⭐ The most important IO in the
game. The +7.5% Global Recharge piece slots
into any defense power. Stack 4–6 of these across your build. |
| Red Fortune
| 10–50 | 6 | Ranged defense bonus. Cheap
filler set for defense toggles. |
| Kismet
| 10–50 | 6 | Includes the +6%
ToHit global unique — one per build, slot in a cheap
toggle like Combat Jumping. |
| Gift of the Ancients
| 10–50 | 6 | Fire resistance and run speed
bonuses. Decent secondary set. |
| Shield Wall
| 50 | 5 | 🔴 Rare. Includes the +5%
Resistance unique — global resist bonus. Expensive but powerful. |
| Reactive Defenses
| 20–50 | 6 | ⭐ Includes the Scaling
Resist Damage unique — resistance scales up as your
HP drops. Excellent clutch survival tool. |
| Steadfast Protection
| 30–50 | 6 | ⭐ Includes the +3%
Defense global unique. One per build. Slot in Tough. |
| Gladiator's Armor
| 50 | 6 | 🔴 Includes the +3%
Defense global unique (different from Steadfast — both
can be slotted in the same power for +6% total). |
🛡️ Resistance Sets
Powers that grant damage resistance.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Unbreakable Guard
| 10–50 | 6 | ⭐ +max HP bonus
at 3-piece. Very popular for Tough slotting to maximize HP pool. |
| Aegis
| 10–50 | 6 | Psionic/status resistance
bonuses. Good for builds concerned about psi damage. |
| Impervious Skin
| 10–50 | 6 | Status effect resistance bonuses. |
| Titanium Coating
| 10–50 | 6 | Recharge bonus at 2-piece. Inexpensive. |
| Resist Damage
| — | — | Common IO — not a set, but used for
single-slot resist enhancement. |
💚 Healing Sets
Powers that heal HP.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Panacea
| 10–50 | 6 | ⭐ Includes the
+HP/+End proc — passive HP and endurance
recovery. Slot in Health. |
| Numina's Convalescence
| 10–50 | 6 | ⭐ Includes the
+Regeneration/+Recovery global unique. Slot in
Health alongside Panacea. |
| Miracle
| 10–50 | 6 | Includes the
+Recovery unique — passive endurance recovery boost. |
| Doctored Wounds
| 10–50 | 6 | Recharge bonus at 4-piece.
Popular for heal powers needing fast recharge (e.g., Twilight Grasp). |
| Touch of the Nictus
| 20–50 | 6 | Includes a Chance for
Negative Energy Damage proc. Often used in heal/drain powers. |
| Theft of Essence
| 20–50 | 6 | Includes a Chance for
+End proc — fires when healing, restoring endurance.
Very popular in heal sets. |
| Preventive Medicine
| 10–50 | 6 | Includes a Chance for
+Absorb proc — gives a damage shield when HP drops
below 50%. |
⚡ Endurance Modification Sets
Powers that drain, boost, or manipulate endurance.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Performance Shifter
| 10–50 | 6 | ⭐ Includes the Chance for
+End proc — passive endurance restoration. Slot in Stamina. |
| Efficacy Adaptor
| 10–50 | 6 | Recharge bonus. Decent secondary
endurance set. |
| Power Transfer
| 10–50 | 6 | Includes a Chance to Heal
Self proc. |
🔒 Hold Sets
Powers that hold (mez) a target.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Unbreakable Constraint
| 50 | 6 | 🔴 Rare. Fire/cold resistance at
3-piece. Chance for Smashing Damage proc. |
| Basilisk's Gaze
| 20–50 | 6 | ⭐ Ranged defense bonus at
4-piece. Very popular for holds. |
| Lockdown
| 20–50 | 6 | ⭐ Includes the +2 Mag
Hold proc — allows holding bosses (Mag 3). Slot in any
hold power. |
| Neuronic Shutdown
| 20–50 | 6 | AoE defense bonus. Alternative
hold set. |
| Fortunata Hypnosis
| 20–50 | 6 | Psionic resistance bonus. |
🌀 Immobilize Sets
Powers that immobilize targets.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Gravitational Anchor
| 50 | 6 | 🔴 Rare. Chance for
Hold proc. Popular in immobilize powers for bonus control. |
| Trap of the Hunter
| 10–50 | 6 | Ranged defense bonus. Most common
budget immobilize set. |
| Immobilise
| 10–50 | 6 | Basic immobilize set. |
| Enfeebled Operation
| 10–50 | 6 | AoE defense. |
| Dreadful Wound
| 10–20 | 6 | Budget leveling set. |
| Debilitative Action
| 10–50 | 6 | Cold resistance bonus. |
😴 Sleep Sets
Powers that put targets to sleep.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Fortunata Hypnosis
| 20–50 | 6 | ⭐ Chance for
+Recharge proc. The best reason to take this set —
fires on use to give a burst of recharge. |
| Call of the Sandman
| 10–50 | 6 | +Regeneration bonus. |
| Lethargic Repose
| 10–50 | 6 | Ranged defense bonus. |
😵 Stun Sets
Powers that disorient/stun targets.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Absolute Amazement
| 50 | 6 | 🔴 Rare. Fire/cold resistance at
3-piece. Chance for ToHit Debuff proc. Used in
Howling Twilight on MM/Dark builds. |
| Rope a Dope
| 10–50 | 6 | AoE defense bonus. Budget stun option. |
| Stupefy
| 10–50 | 6 | Ranged defense bonus. |
😱 Fear Sets
Powers that fear targets.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Glimpse of the Abyss
| 10–50 | 6 | ⭐ Recharge bonus at 4-piece. Most
popular fear set. Used in Fearsome Stare. |
| Unspeakable Terror
| 10–50 | 6 | AoE defense bonus. |
❄️ Slow Movement Sets
Powers that slow targets' movement/recharge.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Tempered Readiness
| 10–50 | 6 | ⭐ Recharge bonus at 4-piece.
Popular in Tar Patch and other slow powers. |
| Impeded Swiftness
| 10–50 | 6 | ⭐ Includes the Chance for
Smashing Damage proc. Excellent in slow-component
attacks (e.g., Demon Prince). |
| Pacing of the Turtle
| 10–50 | 6 | Endurance discount bonus. |
🌊 Knockback / Knockdown Sets
Powers with knockback or knockdown effects.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Force Feedback
| 10–50 | 6 | ⭐ Includes the Chance for
+Recharge proc — fires on knockback, giving burst
recharge. Great in frequently-firing KB powers. |
| Knockback Distance
| — | — | Common IO — converts knockback to
knockdown (important for not scattering enemies). |
| Overwhelming Force
| 10–50 | 6 | Includes the
KB→KD proc (converts knockback to knockdown in
the slotted power). Essential for knockback-heavy sets. |
🎯 Taunt Sets
Taunt and provoke powers (primarily Tanker/Brute).
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Mocking Beratement
| 10–50 | 6 | Recharge bonus. Standard taunt set. |
| mocking beratement | — | — | See above |
👁️ ToHit Debuff Sets
Powers that reduce enemy accuracy/tohit.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Dark Watcher's Despair
| 10–50 | 6 | ⭐ Standard set for ToHit debuff
powers. Used in Darkest Night. |
| Achilles' Heel
| 10–50 | 6 | Includes the Chance for
Resistance Debuff proc — fires to apply -resist on a
hit. Excellent anywhere you want extra -resist stacking. |
| Undermined Defenses
| 21–50 | 6 | Damage bonus at 5-piece. |
📈 ToHit Buff Sets
Powers that increase accuracy/tohit.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Gaussian's Synchronized Fire-Control
| 21–50 | 6 | ⭐ Includes the Chance for
Build Up proc — fires on use to give a temporary
damage boost. Invaluable in Tactics or any persistent ToHit buff. |
| Adjusted Targeting
| 10–50 | 6 | Recharge bonus. Budget ToHit buff set. |
🐾 Pet Damage Sets
Powers that summon or control pets (Mastermind summon powers,
Controller/Dominator pets).
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Blood Mandate
| 10–50 | 6 | ⭐ Best all-around pet set. Good
acc/dam/end pieces and set bonuses including defense bonuses. |
| Soulbound Allegiance
| 10–50 | 6 | ⭐ Includes the Chance for
Build Up proc — gives pets a temporary damage/tohit burst. |
| Command of the Mastermind
| 10–50 | 6 | ⭐ AoE defense bonus at 4-piece.
Recharge bonus at 5-piece. Popular MM set. |
| Edict of the Master
| 10–50 | 6 | Defense bonus. Cheaper
alternative to Blood Mandate. |
| Sovereign Right
| 10–50 | 6 | Resistance bonuses. Budget pet set. |
🐾 Recharge Intensive Pet Sets
For pets that have longer recharge times (Hell on Earth, Phantom
Army, etc.). These are the home of the critical MM global uniques.
| Set Name |
Level Range |
Pieces |
Notable Bonuses / Notes |
| Expedient Reinforcement
| 20–50 | 6 | ⭐⭐ Includes the Resist
Bonus unique — global pet resistance aura. Mandatory
for MMs. |
| Call to Arms
| 10–50 | 6 | ⭐⭐ Includes the Defense
Bonus unique — global pet defense aura. Mandatory for MMs. |
| Mark of Supremacy
| 20–50 | 6 | ⭐⭐ MM-exclusive. Includes
End/Pets +Resistance and Acc/Pets
+Defense global uniques. Both are mandatory for MMs. |
✈️ Travel Sets
Flight
| Set Name |
Level Range |
Notes |
| Soaring
| 10–50 | Run speed bonus. Standard flight set. |
| Freebird
| 10–50 | Includes a +End unique. |
| Blessing of the Zephyr
| 10–50 | ⭐ Includes a Knockback
Resist unique — reduces KB magnitude against you. And
AoE defense bonus. |
Running
| Set Name |
Level Range |
Notes |
| Winter's Gift
| 10–50 | ⭐ Includes the Slow
Resistance unique — global slow resistance. Excellent
QoL. Also has AoE defense bonus. |
| Celerity
| 10–50 | Includes a +Stealth unique
for Sprint-slot stealth. |
| Quickfoot
| 10–50 | Budget running set. |
Jumping
| Set Name |
Level Range |
Notes |
| Bounding Leap
| 10–50 | Jump-based travel set. |
| Jumping IO
| — | Common IO filler. |
Teleport
| Set Name |
Level Range |
Notes |
| Jaunt
| 10–50 | Teleport-specific set. |
| Unbounded Leap
| 10–50 | Also works for jump/teleport powers. |
💡 Defense
Debuff Sets
Powers that reduce enemy defense.
| Set Name |
Level Range |
Pieces |
Notes |
| Analyze Weakness
| 10–50 | 6 | Accuracy bonus. Standard defense
debuff set. |
| Touch of Lady Grey
| 10–50 | 6 | Includes a Chance for
Negative Damage proc. |
| Siphon Insight
| 10–50 | 6 | Recharge bonus. |
🌑 Archetype-Specific
Sets (ATOs) Summary
ATOs drop from incarnate content or can be purchased with Reward
Merits. Each archetype has a unique set with a powerful proc. Superior
versions are level 50 only.
| Archetype |
ATO Set |
Superior Set |
Notable Proc |
| Blaster | Blaster's Wrath | Superior Blaster's
Wrath | Damage boost proc |
| Corruptor | Malice of the Corruptor | Superior
Malice of the Corruptor | +Regen on ally proc |
| Controller | Overpowering Presence | Superior
Overpowering Presence | Extra control proc |
| Defender | Defender's Bastion | Superior
Defender's Bastion | Team defense buff |
| Dominator | Dominating Grasp | Superior Dominating
Grasp | Domination charge proc |
| Mastermind | Sovereign Right / Mark of
Supremacy | Superior Mark of Supremacy | Pet buff uniques |
| Scrapper | Scrapper's Strike | Superior Scrapper's
Strike | Build Up on crit |
| Stalker | Stalker's Guile | Superior Stalker's
Guile | Assassin's Strike proc |
| Tanker | Tanker's Guarantee | Superior Tanker's
Guarantee | Absorb shield proc |
| Brute | Brute's Fury | Superior Brute's
Fury | Fury-based damage proc |
🌟 Universal
/ Highly Recommended Globals Summary
These single IOs are worth acquiring on virtually every build
regardless of archetype:
| IO |
Set |
Power Type |
Effect |
| LotG +7.5% Recharge
| Luck of the Gambler | Defense | ⭐ Global
recharge. Stack 4–6 across defense toggles. |
| Panacea +HP/+End
| Panacea | Healing | ⭐ Passive HP and
endurance recovery. |
| Performance Shifter +End
| Performance Shifter | End Mod | ⭐ Passive
endurance recovery. |
| Numina's +Regen/+Recovery
| Numina's Convalescence | Healing | ⭐ Passive
regen and recovery. |
| Miracle +Recovery
| Miracle | Healing | Passive endurance recovery. |
| Steadfast +3% Def
| Steadfast Protection | Resistance | ⭐ Global
defense. One per build, slot in Tough. |
| Gladiator's Armor +3% Def
| Gladiator's Armor | Defense | 🔴 Global
defense. Stacks with Steadfast for +6% total. |
| Reactive Defenses Scaling Res
| Reactive Defenses | Defense | ⭐ Scaling
resistance as HP drops. |
| Kismet +6% ToHit
| Kismet | Defense | Global ToHit. One per
build, slot in Combat Jumping. |
| Shield Wall +5% Res
| Shield Wall | Defense | 🔴 Global resistance. Expensive. |
| Gaussian's Chance for Build Up
| Gaussian's Sync. Fire-Control | ToHit
Buff | ⭐ Proc fires in Tactics or any persistent ToHit buff. |
| Achilles' Heel Chance for -Res
| Achilles' Heel | ToHit Debuff | Proc applies
-resistance on hit. Fires in debuff powers. |
| Impeded Swiftness Chance Smash
| Impeded Swiftness | Slow | Proc fires in
slow-component attacks. |
| Force Feedback +Recharge
| Force Feedback | Knockback | Proc gives burst
recharge on knockback procs. |
| Winter's Gift Slow Resist
| Winter's Gift | Running | Global slow
resistance. QoL for any build. |
| Blessing of the Zephyr KB Resist
| Blessing of the Zephyr | Flight | Global
knockback resistance. |
📋 Quick Set Bonus Reference
Key set bonuses to chase when building:
| Bonus Type |
Best Sources |
| +Recharge
| LotG 7.5% (defense powers), Decimation (ranged), Tempered
Readiness (slow), Doctored Wounds (heal), Positron's Blast (TAoE) |
| +Defense (Ranged)
| Thunderstrike (ranged), Sting of the Manticore (sniper),
Mako's Bite (melee), Trap of the Hunter (immob) |
| +Defense (Melee)
| Kinetic Combat (melee), Obliteration (PBAoE) |
| +Defense (AoE)
| Obliteration (PBAoE), Scirocco's Dervish (PBAoE),
Bombardment (TAoE) |
| +Max HP
| Unbreakable Guard (resistance), Devastation (ranged) |
| +Resistance
| Shield Wall unique, Unbreakable Guard, various 3-piece
rare set bonuses (Hecatomb, Ragnarok, Armageddon, etc.) |
| +Recovery
| Miracle unique, Numina's unique, Performance Shifter proc |
| +Regen
| Numina's unique, Panacea proc |
| Pet Defense/Resist
| Mark of Supremacy, Expedient Reinforcement, Call to Arms
(all in Hell on Earth for MMs) |
City of Heroes: Homecoming — IO Enhancement Sets Reference —
Updated Issue 27+
Source: Homecoming Wiki, community builds, in-game data