[3.0] Poison Nova - themed build by Woolfio

Hey there, Woolfio here.
I really wanted to get some nostalgia back from Diablo 2, so i thought about making poison nova build in PoE. While we don't have any spell that looks or works like necromancer's poison nova, but i figured i can turn Ice Nova or Vortex into sort of poison nova. Using conversion from cold to fire and then from fire to chaos i was able to make my ice nova into poisonous nova. I made this build purely for fun and nostalgia, but it does have some potential but not for end game. Poison is simply too weak even with 6l, lvl20 q20 gems, 20 wither stacks and vulnerability the poison DoT reaches only like 96k, that is with full duration poison (29k DoT damage per second), per stack, but you are not going to be rapidly applying poisons. Build gets over 6k ES, is Occultist chaos inoculation. Still i had lots of fun playing it because it just felt so different and unusual.

I have a full video build guide: https://www.youtube.com/watch?v=7kA3jf7fsDI

Pros and Cons. In no particular order
I had fun, but playing CI is probably not for me. It is hard to keep ES up without any leech or regen, so it became too annoying especially against harbingers and breaches.
Immune to chaos degen and poison. But ignites are scary, because they prevent ES from recharging. Freezes are also a problem. Stuns not so much. I felt like my damage was good against some bosses but terrible against others. Very mixed feelings about killing bosses.
Synergy with frostbolt, ice nova, vortex is fun and you can reach enemies behind corner, which often makes it safe, but only until you get overwhelmed by enemies. CWDT with frost wall is great defensive mechanic, which isn't used as often as it probably should. But never use it in Haku missions or Labyrinth.

Unique items


Other items
Just rare items with as high energy shield and resistances as possible. Not using Volkuur's unique gloves because it cuts poison duration in half and only has 20% chance to poison and for slow hitting spell that is not good.

Bandit reward
I helped Alira for easy all elemental resistances and flat mana regen.

Passive skill tree
This passive tree is for level 86.
Link to passive tree:

I also have path of building import code. 1st is my current 5 link setup at lvl 81 and 2nd is with all skills at lvl20 and with 20 wither stacks against standard bosses at lvl86 with 6 link setup:
1st https://pastebin.com/gUz4BZ8j
2nd https://pastebin.com/4P4640RK

Skills and links
Infernal Mantle links:
5 link
Ice Nova (or Vortex) + Deadly Ailments + Cold to Fire + Elemental Focus + Unbound Ailments
For 6 link
Vile Toxins

Other skills
Frostbolt + Cold to Fire + Faster Casting + Elemental Focus. Use this to clear weaker enemies at range and cast Ice nova/Vortex at distance.
Or use 6 link Frostbolt just add Unbound Ailments and Deadly Ailments.

Herald of Ice for damage. Discipline for ES. Flame Dash to go over your walls. Flame golem for a bit more damage.
Orb of Storm to trigger Elemental Overload also linked with Curse on hit + Vulnerability. Yes, that is correct, EO increases your chaos damage and poison, and vulnerability increases DoT, while elemental weakness does nothing for DoT.
Cast When Damage Taken lvl2 + Immortal Call lvl4 + Frostbolt lvl12 + Frost wall lvl11. Very great defensively and while this frostbolt does not do much damage but you can cast ice nova/vortex from it.
Wither + Spell Totem + Faster Casting. Always use against bosses to boost damage and for some distraction.

Will edit later in case i forgot something.