get rid of Yachiro, after level 85ish she drops off HARD. Once even the F2P's hit rate gets over 140 on average, at best she can only dodge 50% of the time...
oh, and good job with your kensei, don't see enough good ones around. but a vanguard and Gin should be your next partners IMO you gonna replace your kensei with yama for pvp? just curious