Overview
This Stormweaver build turns Cast on Critical into a self-feeding comet engine. Instead of standing still to aim one big spell, you flood the screen with Spark and Orb of Storms hits, and every critical strike rains down Comets through the trigger. The result is a caster that auto-targets, freezes, and shocks constantly while a stream of Comets deletes anything tanky.
The key to its power in 0.5 is how it scales across content. On easy maps, Spark and Orb of Storms alone clear smoothly, so you can run straight through packs. But once maps get juiced, rares stack up, or a pinnacle boss appears, the Cast on Critical layer takes over — more hits mean more criticals, more criticals mean more Comets, and the target gets nuked before it can act. Crucially, this is not a one-button setup: Spark damage, Orb of Storms damage, and the fire-infused Comet damage are all scaled together, so the whole hit engine compounds.
Pros & Cons
Pros
- Auto-targeting trigger playstyle — no manual aiming of the big nuke
- Constant freeze and shock for strong defensive layering
- Scales up the more dense and dangerous the content gets
- Deletes pinnacle bosses once the Comet trigger ramps
- Smooth mapping loop: drop Orb of Storms, spam Spark
Cons
- Heavily gear-gated (Malachai’s Artistry, Call of the Brotherhood, ~180 spirit)
- Busy setup on hard bosses (sigil, curse, frost bomb, mana tempest)
- Energy-shield based — needs sustain investment to survive
- Not a league-start build; comes online after the key uniques
Key Skills
- Spark — main spam skill and primary hit generator that feeds the trigger
- Orb of Storms — dropped in clusters so Spark passing through multiplies hits
- Cast on Critical → Comet — the boss-deleting payload, triggered by crit volume
- Frost Bomb — exposure plus fire infusion via Elemental Equilibrium
- Sigil of Power / Mana Tempest — burst windows for rituals, breaches, and bosses
Gear & Anointments
The build is built around three ideas: spell crit, elemental infusion scaling, and enough energy shield plus mana to survive. Mandatory uniques include Malachai’s Artistry gloves (locks a high crit-damage bonus so you can abuse crit-chance / reduced-crit-damage supports like Pinpoint Critical) and Call of the Brotherhood (converts lightning to cold so Spark and Orb of Storms scale with the cold infusion setup). The staff is your biggest rare damage slot — prioritize gain-as-extra, increased spell damage, +levels to all spell skills, and cast speed. Aim for roughly 180 total spirit to cover Cast on Critical, Mana Remnants, Staff and Elements, and Convalescence. Verify exact item rolls and the passive/jewel layout against the source video.
Endgame Notes
For bosses, pre-place Sigil of Power and Elemental Weakness before the target is hittable, use Frost Bomb for exposure, then let Cast on Critical do the work — fire Mana Tempest into the burst phase so Comets land during your strongest damage window. The Stormweaver ascendancy order is Tempest Caller, Strike Twice, Shaper of the Storms, then Storm’s Recollection.
Credits & Source
Build credited to KaidGames2. See the source video for the full build’s gameplay footage and voice commentary: THE HIGHEST DAMAGE COC COMET BUILD IN 0.5! POE 2 Sorceress Build.