Efficacy Support
Supports any skill that deals damage or has a duration.
How to think about it
A broad duration-and-damage option. Confirm that the active skill actually has a duration or damage component before comparing it with a narrower support.
What it can support
PoExplorer accepts a match only when this support's allowed types intersect the active skill's source types, none of its exclusions conflict, and any gem-only restriction is satisfied.
Allowed source types
Skills that pass the source rules
These are compatibility candidates—not a promise that every pairing is optimal for a particular build.
Arc
Spell / Damage / Trappable
Blade Vortex
Spell / Damage / Area
Boneshatter
Attack / MeleeSingleTarget / Multistrikeable
Contagion
Spell / Area / Duration
Cyclone
Attack / Area / Melee
Essence Drain
Spell / Projectile / ProjectilesFromUser
Explosive Arrow
Attack / RangedAttack / MirageArcherCanUse
Fireball
Projectile / ProjectilesFromUser / Spell
Flame Dash
Spell / Movement / Damage
Flicker Strike
Attack / Melee / MeleeSingleTarget
Freezing Pulse
Spell / Projectile / ProjectilesFromUser
Frostbolt
Spell / Projectile / ProjectilesFromUser
Ice Nova
Spell / Damage / Area
Lightning Arrow
Attack / RangedAttack / MirageArcherCanUse
Molten Strike
Attack / Projectile / Area
Righteous Fire
Spell / Buff / Area
Summon Raging Spirit
Spell / Minion / Duration
Summon Skeletons
Spell / Minion / Duration
Toxic Rain
Attack / RangedAttack / MirageArcherCanUse