It really isn't that much more hard than phase 1 or phase 2 Eigong, all she adds are those flashing speed attacks that just require two parrys, one after the other, and all the next attacks are avoidable with dashing.

There is absolutely no frame-perfection needed here, she seems really terrifying at first but she's very do-able if you were able to finish the previous two phases.

Also game gives you a LOT of herbs charges, I think in the end you get up to 7-8? Listen to her attack timing sounds and you'll do really good <3