I finally beat this event! My original line up was Bossk Lead, Dengar, Jango, and one of my other leveled up Bounty Hunters.
I ended up using Bossk Lead, Dengar, Boba, Greedo, and IG-88. My kill order was Lando, Leia, Chewbacca, Han, and then finally R2. I got it on my second try :-)
I ran it a few more times. I would win if R2 didn't stealth everyone right at the beginning. RNG was in my favor
-->> Final Bounty Hunter Team