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