This has been done before, but I couldn't find anything even close to up-to-date, so I tried my hand on doing it myself. I've long been fascinated by the Storm Herald, Lightning Damage is probably my favourite damage type in the game and fully converting Doom Bolt sounded like a whole load of fun.
First build (and first post) for me on the forum, so I guess I can be decently happy with how things turned out. Not surprised this didn't make it into the Top2021, but it can do all endgame content and the visuals are pretty amazing. I did this on softcore, so no promises for harcore.
The Build:
Updated Lightning Doom Bolt Conjurer
Changes thanks to @tqFan
Changelog:
Switched out Wendigo Totem for Solael’s Witchfire and Second Rite for more DA and Crit Damage
Exchanged Unholy Inscription for Restless Remains for a bit more Casting Speed

EDIT: Statsheet is after changes and with Blood of Dreeg active.
Gear Choices:
Main Hand: Whole reason I’m doing this build in the first place.
Head, Gloves: Brings the cooldown of DB to 1.7-1.6 seconds after global CDR. Not the lowest it can go, but most items supporting DB do not support Lightning Damage.
Off-Hand, Amulet: More summons plus shorter CD on Storm Totems. Not quite Ludrigan, but five Totems still end up doing a decent bit of damage.
Chest, Shoulders, Pants, Boots: Generic support for Doom Bolt, Storm Totems and Wind Devils.
Rings, Medal, Relic: Gollus Rings help with fixing resistances and health regen, Medal and Relic are generic Lightning support.
Belt: More health regen and a defensive proc.
Craft whatever possible with Freeze resistance. Build ends up a bit short on that front (70%), with really good rolls it’s probably just enough to cap it. Otherwise pop a hoarfrost ointment or don’t go cuddling with Moosi.
Devotions:
Fairly standard for Lightning builds as far as I can tell. Originally had Tempest instead of Turtle and Crab, but turned out to be way too flimsy. Deals a bit less damage with this setup, and four defensive procs (on top of Tinker’s Ingenuity) feels like a lot, but at least it doesn’t die on the first step into SR anymore.
Speaking of SR, which content can this thing do?
Shattered Realm: 30-31 easy and decently fast, although not in contention for speedruns by any means. Pushed all the way up to 35, but admittedly died once in 34.
Celestial bosses: Haven’t tried Lokarr, but pretty confident it can do it. Ravager was fine, but requires kiting. Luckily, Doom Bolt and Storm Totem are pretty good at that. Same goes for Callagadra. Kill times are fine but not amazing.
EDIT: Re-did most of the achievements with the updated build, feels much smoother and damage is noticeably higher, while survivability didn’t decrease much. Binding Arcane Bomb to Doom Bolt makes a big difference for Ravager specifically, because there is less time to stand still and cast Chain Lightning. Overall very happy with the improvements and the suggestions I got.
Anyway, glad to finally contribute something here, I have learned a lot from lurking on the forum for the past six years and I am sure the hivemind can help me improve this a little while we all wait for Fangs of Asterkarn!
SR30-31
