I think it can depend of ur minato and what u wanna do with him, if u have him 3 stars or 4, use him p1 or p2.

If u have him 3 stars or 4 and use +2 mistery kakashi summer looks best.

If u use his y+1 for spam every round and play against someone with dodge kakashi susano'o is good.

If u use him as p2 only for barrier... probably kakashi summer again.