I used that flying attack thingie (jump towards her and press the Y button) cuz she is heavily damaged by it and sometimes she gets stunned.
Also when she tries to throw the pilars at you use the art of Inferno ninpo and she will fall to the ground then hit her with all you got.

Note:
The flying attack I mentioned is only available with the Dragon Sword.
If you run out of Ki and you're having a hard time dodging the pilars just run along a wall or roll and jump.
And, in case you haven't noticed or grabbed them, there are a couple of elixirs and a scarab nearby.


Hope it helps

how much of that devil stuff U got if u got lots it'll be easy for u. I havent beaten her yet but I have an easy way that I saw from another website. Basicly get her down on ground kneeling then blast her with fireball nimpa, do that all the time u should beat her easily.

I only have 2 bars left and none for devil stuff on her, I got her down good, but then kills me all the time.

PS

Avoid her levitation attack its her most powerfull. When the throws those pillars run wall. When she throws those little balls at you run away from her to the side from affar. when the comes swoops down on U blast her, also when she throws stuff at you blast her. She can't dodge those when she tries to throw stuf at you I've done it.

Have you tried LV2 vigoorian flail