So, there are few things you could be doing better, but your biggest flaw is most definitely the shifu uptime. You're prioritizing the Jinpu buff combo over Kasha, which is destroying your dps in certain sections of the fight. you should have almost an equal amount of Gekkos and Kashas, but your Gekko count is significantly higher. Secondly, I can't find it, but you're using Hagakure on less than 3 sen, which in this fight is pretty pointless. You're losing around 10 Shintens because of this and it is hurting your dps. The one midare you gain is no where near worth it.

Other things that contribute: you don't have a ninja for trick attack: Battle Litany isn't doing much for you, you didn't pot, and your direct hit percentage is pretty low. I'd suggest remelding, eating food, whatever you gotta do to get it up. You have the fundamentals down pretty well, just stop letting shifu fall off and make sure you Haga on 3 sen only until you understand when it can be used differently.