Well I hope everyone is super fast for P1. I can't get those 3 to work and checking videos it is likely due to speed. I just got a new arrow with speed primary for Han so maybe next time. You can do it with CLS with only a few retreats though. Anyway, yes, you should retreat them. Get Han out first and CLS can finish P1 or send new team in when only a couple more hits needed.
Without zader, decent resistance then you probably aren't going to make a big hole in P2 I'm afraid. Probably some wiggs based team.