So I was stuck at Duskveil. Until I just decided to fuck it and respec into pure melee with spellbinder. If you just want to win, this is it. The damage output is high and after enough losses you should've downloaded its moves. Took the chapter 4 boss down too.
Although I decided to respec to a Ring of Fire build after it. I don't know why I slept on this one, its stupidly OP. Inside it you are basically invincible, and no boss can dispel it. You can do level 4 charged pogo strikes from cloud step with it, you can attack with infinite stamina and your health barely depletes. I tested against Yin Tiger, which I beat quite easily, and he barely damaged me whenever RoF was up.
The problem with this game is you need to pick a lane. With jack of all trades the damage output is rather poor and bosses take a while. But if you go full spellbinder with crit, damage, Pillar etc maxed and a spirit+gear that raises these things you will dish out, even without pills.
Generally I see its mandatory to max your attacking stats at the very least, even without spellbinder yet you will dish out decent damage. Do this along with the combo after evade and resolute counterflow perks and you can win if you're half decent at evading.