EU server, custom crit Aventurine build (see end of post).
I hadn't tried this Divergent Universe bonus-goodies goal yet on any playthrough, and my critters on EU are my weakest roster. Anaxa failed soloing the end boss today during my usual run of the weekly variant (got CC'd in phase 3) and I redid the fight with a full team out of annoyance. But then I thought... what if I run through the entire thing again with buffs designed purely around Señor Gambler-kun?
Whaddayathink, boyo? Can we do this?
Yes. Yes we can. The fight took a while, but the main thing I was worried about was that phase 3 crowd-control debuff. Aventurine merrily resisted it every time Hoolay fired it off, thanks in part to copious amounts of sustain built up during the run. Good normal attacks averaged about 200-400k, though most of his damage was from follow-ups.
DU variant at the time: Relatively Successful Prescription curio
Difficulty: Threshold Protocol 1
3-star equation I used: Wounds of Plenty
Buff highest focus: Sustain (shield, effect resist, max hp, def, take less damage, resurrect on being downed, anything useful that will self-heal, healing increase)
Medium focus: Anything related to blazar, spread single-target damage to adjacents, follow-up attacks, normal attacks, Butterfly Soul stuff
Lower focus: Buff on skill use, ER, action order increase, speed, weakness break (situational for Hoolay's minions)
Oh, and Aventurine's best hit was a follow-up which isn't a surprise: