>>538810629
Well, forget everything I said. It turns out you can actually win AoB UV 100% kills without extreme cheese, but the answer was to not use Berserk at all! Or at least not at the start.
Seems like the actual play was to get Angry Mofo since that trait gives you a shitload of damage, much more than getting Brute 3 and the only condition to have that massive damage is to be at half health more or less, which you're probably gonna be most of the time even if you don't want to. It also has Tough as Nails as a requisite, so you get pretty tanky even if you're at low health.

I probably should've changed to my katana for the final hit to complete the cosplay, though...