Thats my team and exactly what I've been doing.Yes I've beat everything outside the co-op. I used Rabbid Luigi and Rabbid Mario. That challenge was very, very tough. I only had Rabbid Luigi with like 50HP left at the end. Something important is I used Stone effects for Rabbid Luigi's gun and Rabbid Mario's hammer. Stone makes the effected enemy completely skip their then. No attacks, no movement, no special abilities. If you use Rabbid Mario right, he can Stone like 5 enemies at once