[3.21] Voltaxic Rift Autobomber, Poison Herald of Thunder Pathfinder

The Storm Secret ring procs HoT storms whenever you shock or kill a shocked enemy. This damage will ramp a little as more and more storms are procced. The ring will self damage you every time a storm is created. We counter this with high enough leech an regen.

Voltaxic Rift converts all lightning damage to chaos damage and makes our chaos damage shock. I like Lightning Arrow or storm brand to start the loop. Link Shock Nova/crackling lance with CWDT and the storms will keep going without the flask.

Voltaxic Rift converts all damage to chaos, which allows all damage to poison. Dendrobate, jewels, and passives give us a 100% chance to poison. We want to scale as much poison damage as possible. This damage will ramp as more storms are procced and more poisons inflicted.

Master Toxicist is essential to this build. It is basically Inpulsa explode, but in poison form. It will proliferate poison through any pack that your herald barely touches. The clear it gives feels amazing, and this build is dead without it.

Capped Spell Suppression
Bloodnotch/Immutable Force/Petrified Blood
Elemental Ailment Immune
Taste of Hate
175%+ Movespeed
Aspect of the Crab
Enfeeble
Temp Chains
Pathfinder elemental flask effect
Endurance Charges - Storm Secret always hits us, so we always are gaining charges through enduring composure small cluster.
Eventually Progenisis

Voltaxic Rift - This converts all lightning damage to chaos damage, and lets chaos damage shock. Essential weapon to get the HoT loop going.

Storm Secret - Essential ring. Allows HoT to proc when we shock an enemy. Build will not work without it. You can equip 2 of these for a big DPS increase if you can deal with the damage taken. Dendrobate is enough ES to cover 1 storm secret, but you will need at least 800ES to cover the damage from a 2nd storm secret. The new(3.21) life recoup points on the tree could also help sustain a 2nd ring without as much ES.

Calamitous Visions - Allocates Lone Messenger. Huge DPS at the cost of all other auras.

Ancestral Vision - 50% Ailment Immunity along with 20% from tree and 30% from boots.

Bloodnotch & Immutable Force - These combined with petrified blood are an extremely strong defensive layer. You will need the energy shield mastery "stun threshold is based on 60% of your energy shield instead of life" as well. At high rolls, you can AFK in t16 maps and your character will tank and recover almost any hit. To be the most effective, you will need at least 58% recovery on Bloodnotch, a 21/20 petrified blood, and 40% life recoup. Lower numbers will need to be made up for with life leech/regen. Master Surgeon with a life flask is also an option. See the ascendancy section for more info on that. A higher roll on immutable force feels better, but is not necessary. Be sure that you have upgraded other gear to meet petrified blood's strength requirement, as you need the high level gem.

Dendrobate - Chance to Poison and Posion damage mods are really good here. Be sure that you have the attributes to make it work. At 100% chance to poison this feels really smooth

Original Sin(Optional) - RIP

Flasks are a huge part of pathfinder. They are more important than almost any piece of gear. They are very versatile and can be switched out depending on the content you are doing.

Taste of Hate - Very important. A huge source of physical mitigation. Benefits of a Sapphire flask along with phys taken as cold. Makes us a lot tankier.

Magic Flasks
Quicksilver
Ruby
Topaz
Jade <-- eventually replace with Progenisis.

Good prefixes are charge recovery, duration, and reduced charges per use. The suffixes we want are:

Bleeding/CB immunity
% reduced mana cost of skills during effect - This benchcraft can be found by unvieling cinderswallow urns that drop from the final betrayal boss.

Final two suffixes can pick between:
Increased Evasion
Reduced Curse
Movespeed
Avoid Stun <-- Do not use with Bloodnotch

Note that if you need sustain, you can drop the jade flask for a life flask and take Master Surgeon. See Ascendancy section for more details.

Progenisis - Big tanky upgrade. Great if you can afford it. Replace your jade flask with evasion suffix.

Vessel Of Vinktar(Optional) - It gives us a little DPS increase and mitigates Storm Secret self damage. Enchant to use when charges reach full. This flask helps keeps HoT storms going. It keeps the loop going smoother than the cwdt loop, but it's not as good as crafted mana cost or regen on a magic topaz flask imo.

Atziri's Promise (Optional) - This flask can be used for life leech until you roll chaos leech on your flasks. Just like Vessel, I would eventually drop it for magic flasks or progenisis.

Witchfire Brew(Optional) - If you drop enfeeble, this can give you a DPS increase. You will be squishier. LVL 21 despair on the flask is better than a lower level despair with cwdt gem, and more consistent application than the higher level gems.

As you get further into the atlas, capped spell suppression and chaos resistance become very important. Look for them on rare gear when upgrading.

Helmet - Implicits are increased duration of ailments and curse effect. Enfeeble curse effect to be more tanky, Temp chains curse effect for more DPS. Spell suppression, life, and life regen are mods we want along with high evasion/resists. Phys taken as fire is strong if you can fit it in. Enchanting with HoT mana reservation Efficiency will allow us to add in an Aspect buff.
Gloves - Chaos damage over time implicit along with Chaos leech. Spell Suppresson if not capped, life, attributes, resists and high evasion are mods you want. Can beastcraft aspect of the crab or spider if you have an open suffix.

Boots - Poisons deal damage faster and either movespeed or chaos res implicits. 30% movespeed, life, and life regen are preferred. We want our boots to have 30% ailment avoid also.

Amulet - +1 to all and lightning skill gems, attributes, and an Aspect skill if possible. Can look at other damaging mods or life/evasion. but it can be tough to get with the +1's. Can beastcraft aspect of the crab if you have an open suffix. Anoint with Whispers of doom.

Quiver - Stat filler. Life/resists, any stats or attributes you still need.


Belt
Flask effect duration and flask charges gained are the most important. From there fill out any missing holes that you might have. Needed attributes, then cap your resistances, get life/evasion. Finally chaos/lightning damage if possible.

Large Cluster Jewels - 3 large clusters with Wicked Pall, Unwaveringly Evil, and Unholy grace are the notables we want.

Medium Cluster jewels - Two jewels with Circling oblivion and flow of life. Two other jewels with Lasting impression and empowered envoy. These can be replaced with Self-fulfilling prophecy jewels if you get elemental overload on your Weapon passive tree.

Small Cluster Jewel - Enduring composure is a must for defense. Endurance charges will generate if we get hit once every 9-10 seconds, so the uptime is pretty reliable.

Jewels - Flask effect Duration, % increased max life and Poison Chance/duration are the big mods we are looking for. We need to have four 5% chance to poison jewels to hit 100% on HoT. Chaos dmg over time multi and damage with poison are also good.