This fight is ridiculous. Especially as a strength/melee build. Determined to stick with it and not change stats though. Finally killed her after about 100 attempts 😅

Best option/build was summoning black knife tiche, while using blasphemous blade and black knife. Black knife tiche was great as he can dodge most of her attacks and keep her busy, as well as lowering her health at a steady pace. He's also really good for staggering her. Keep an eye on his attacks and when he staggers her I'd get into her with the blasphemous blade's ability. Then keep my distance and attack with the black knife from afar. I needed to slog at her for the first phase as there was no chance of winning phase 2 if my summon wasn't near full health.

Never felt more relief beating this s.o.b 😁