Best Formation

desr12

So I have a 4th mod, almost to 5th with speed bonus, Shinso Gin and Muramasa sitting on the bench  for a couple months now. I currently have Senju - Hiki - B.Renji - H.Ichigo with Zangetsu and I'm about a week away from pure T1 for one of my partners (when I get my year login reward). So basically looking for an endgame formation with what I have now cause i'm not gonna top up anymore. And this is strictly pvp, cause I use both B. Renji and Shinso in pve.