The following support gems are recommendations by GGG as listed in-game, and do not necessarily reflect optimal combinations or the views of the wiki.
Gem tier
Support gems
I
Controlled DestructionControlled DestructionSupport, Spell Category: Controlled Destruction Tier: 1Support Requirements: +5 IntSupports Spells that Hit enemies, boosting their damage but preventing them from dealing Critical Hits.Supported Spells deal 25% more Hit Damage Supported Skills cannot deal Critical HitsPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Module Error: No results found for item using search term "item_name = Execute"
HourglassHourglassSupport Category: Grants Cooldown Tier: 1 Cooldown Time: 10.00 sec Can Store 1 Use(s)Support Requirements: +5 IntSupports any damaging skill that you use yourself, causing it to deal significantly more damage but gain a long cooldown. Cannot support Skills which already have a cooldown.Supported Skills deal 30% more Damage Supported Skills have a Cooldown of 10 secondsPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
II
ElectrocuteElectrocuteSupport, Lightning Category: Electrocute Tier: 2Support Requirements: +5 DexSupports any Skill which can deal Damage. Lightning Damage from Supported Skills can inflict Electrocute, but Supported Skills cannot inflict Shock.Supported Skills Cannot inflict Shock Lightning Damage from Supported Skills Contributes to Electrocution BuildupPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Inevitable CriticalInevitable CriticalSupport Category: Inevitable Critical Tier: 3 Cost & Reservation Multiplier: 120%Support Requirements: +5 IntSupports any skill you use yourself that Hits enemies, causing it to accumulate Critical Hit chance over time.Supported Skills gain 25% increased Critical Hit Chance each second, up to 200%. This Critical Hit Chance is lost whenever a skill supported by Inevitable Critical Critically HitsPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Lightning PenetrationLightning PenetrationSupport, Lightning Category: Lightning Penetration Tier: 2 Cost & Reservation Multiplier: 120%Support Requirements: +5 DexSupports any skill that Hits enemies, making those HitsPenetrate enemy Lightning resistance.Supported Skills Penetrate 30% Lightning ResistancePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
III
Elemental FocusElemental FocusSupport Category: Elemental Focus Tier: 3Support Requirements: +5 IntSupports any skill that Hits enemies, causing it to deal more Elemental Damage but be unable to inflict Elemental Ailments.Supported Skills deal 25% more Elemental Damage Supported Skills cannot inflict Elemental AilmentsPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Neural OverloadNeural OverloadSupport, Lightning Category: Electrocute Tier: 3Support Requirements: +5 DexSupports any skill that Hits enemies. Nearby enemies are marked when they are Primed for Electrocution, and hitting a marked enemy with a supported skill will Electrocute them.Supported Skills ElectrocutePrimed enemies on HitPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
SupercriticalSupercriticalSupport Category: Supercritical Tier: 3Support Requirements: +5 IntSupports any skill that Hits enemies, causing it to deal more damage with Critical Hits but have less Critical Hit chance.Supported Skills have 100% increased Critical Damage Bonus Supported Skills have 20% less Critical Hit chancePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
IV
V
Item acquisition
Lightning Conduit has restrictions on where or how it can drop.