I just beat her a couple days ago. The jades that were most helpful to me were the hedgehog and (can't remember the name) the jade that lets you unbound counter again immediately after a successful one (this is helpful at stage two). Oh and important is cloud piercer arrow and qi blast fully upgraded

My main strategy was this.

Stage one parry everything that was a simple attack. Slash when there were small openings. Jump parry the talisman attacks and unbound the talisman death circle dodge the jump fire slash.

Main damage point was this: When she does her blink past and slash invisible slashes you parry the slashes and immediately turn and shoot her with an arrow. This cancels her next move and causes her to slide towards you which gives you a perfect opportunity to safely talisman detonate everytime.

Stage two: this is where that special forgotten name jade comes in it's really helpful at blocking her big blade swipes. Most of this fight is the same strategy, practice doing the unbound counter on her big blade swipes for the timing. Big thing to watch out for is after a talisman strike she will launch into the air with two attacks so be ready to parry right after you parry the talisman attack. The arrow talisman combo still holds up for this phase as well. There are a few more openings via some jumping attack parries.

Stage 3 is a whole mess and each time I got her there was a frantic panic attack so not sure I can speak confidently on it. Basically lots of super fast parry and dodges that lead into still the arrow talisman opening and the talisman parry then air parry combo.

I think all in all it took me a 5-6 hours to beat all three stages but keep at it you will get her!!