Classes
Warlock/Minstrel
Playstyle
Kill enemies all around you while running around and holding down one button
Skills
Acid Cloud (LV. 16) use Acid Blast before you get the Mana Cost minstrel nodes maxed - Swift Affliction Support, Chaos Damage Support, Damage Over Time Support, Ailment Damage Support, Archmage Support (use Flat Chaos Damage Support if you can't sustain mana cost yet)
Wish (LV.16) or any other healing spell of your choice - Minor Cooldown Reduction Support, Increased Healing Support, Immediate Care Support
Curse of Despair (LV. 16) - Effect Duration Support, Expanded Area Support, Minor Cooldown Reduction Support
Black Hole (LV. 16) - Minor Cooldown Reduction Support, Expanded Area Support
Skill Passives
8/8 Poison Chance (reset these once you can reach 100% poison chance without them), 8/8 Mana Cost, 8/8 Damage Over Time, 8/8 Area Of Effect, 2/8 Damage Over Time Lifesteal, 8/8 Cooldown Reduction,8/8 Cast Speed, 8/8 Health
Stat Priority
Mana Regen/Mana Cost Reduction -> Chaos/Ailment/DoT/Poison/Spell Damage -> Mana -> Health (Also important, slot in a few End runes for some physical damage reduction this build desperately needs, and remember to have your other resistances capped)
Recommended Items/Uniques/Runewords
Mutant Skeleton Leggins and Boots (Swap to warden leggings later), Archgamble staff is really nice if you can get it on high enough lvl. For Runewords, Ancient's Pledge and Stealth are very helpful for mana sustain.
Keystones/Game Changers
Tornmentor - a very nice damage increase for the build
Acrobat - we dont scale armor nor dodge so this is some free damage reduction
Mana Battery - This one lets us use the big mana pool that the build has once we can perma sustain Poison Cloud
Ascendacy
Assassin for the poison nodes, dont take crit stuff, crit does not affect ailments