T16 Map run: https://www.youtube.com/watch?v=skSJWUa43fM
PoB (Very similar to gear used in showcase) : https://pobb.in/F6qIGHuFbyWS
(PoB isn't perfect and I don't know how overlaps work with lancing steel and woke cascade)

• Budget: ~20-30d maybe. I got a lot of the gear for cheap.
• I don't have a Headhunter but the build will scale very well with one if you have it.

Main idea:

• Charge stacking = big damage, AoE & defence (with updated endurance charges).
• Importantly, most of the damage is generic (i.e not specific to spells or attacks), so it also scales explosions. is - Hatred Sublime Vision provides explosions with base crit, and lets Herald Of Ice pops chain.
• Cold-convert Reap gives big damage with blood charges/woke cascade and has big AoE.
• CoC because I prefer the playstyle. Swap in a void battery and self cast if you want.
• Replica restless ward gives speed and enough regen to sustain the cost of Reap.