Not gonna lie, I had a real tough time with her. When I first ran in there with my puny Blade of Mercy, I got spanked hard. I learned pretty quick that attacking her body is useless. You need to go after her hands and arms, which are usually up in the air or coming down at you. I switched to whip mode with the Threaded Cane so I could flail in their general direction. It worked, but at one point in the clip, she drops me to like 1 health. The Good Blood was with me.