I was almost done with the story. Divine Confetti is too scarce to be wasting on dying constantly. You also don't get prayer beads or memories from them so fuck that.

With Lady butterfly, if you're not using ninja stars, use them. You can hit her out of her jump off the top rope moves with them and she'll fall to the ground for free damage. Also on her 2nd stage just start attacking her so she doesn't get her spirits off. If she does just run around the stage until they disappear.

Ashina? Pray to the parry gods.

If I got stuck on a boss for longer than I wanted, I went into it playing to learn instead of playing to beat it. I was able to pick up on their tells and patterns and was able to parry almost anything after that.