Captain Rex Marquee Event Problems

I just restarted and auto'd over and over again. Eventually, I got lucky and they took down Bossk before PO. Still took a long and I had to take over manually to use basics to finish Dengar instead of weak-hitting AOEs. Maybe don't combine a weak-hitting lineup with character who can regenerate most of their health and protection in one move?

I guess the good news is that Captain Rex will be GREAT for getting those conquest armor shred feats done.