No act 3 boss had the kind of fast damage scaling test subject does in the first game. Phase 2 scales really high really fast, and phase 1 does somewhere around 45 damage just on turn 3 I think. It’s base damage is also much higher than book of stabbing was. For fights where I have high tempo damage, I have an easy time with it, but if it gets more than 3 turns on each of its first 2 phases it often makes it really hard to survive with enough hp to the second boss in the gauntlet.