World's First Solo Herald of Finality on Warlock (+70 minutes)

https://www.youtube.com/watch?v=7_Hmvzf_1P8

Absolutely ridiculous effort and patience to achieve this. The TL;DR is backtracking to the first encounter after the wipe happens to cancel it out/break the timer, then using Alethonym to farm for the 50+ Heavy GL shots needed to deal enough damage to 3 phase the boss (otherwise enrage would happen). He farms for an entire second phase's worth of ammo to ensure final stand too, which he barely trades with the boss and eeks out the kill.

Uses Aegis's Ex Diris/Bittersweet/Sanguine Well Arc Surge Swap loadout, plus tonic boosts, plus artifact mods, in order to achieve the rotation and total damage needed.