For some reason im pretty sure it's bugged , requirements are 5 stars characters. I'm using 7 star characters and still losing including 18.5k dooku, 18k ventress . Characters im fighting are lvl 85...
Ideas
It's suppose to be beatable at 5 stars but can't be beat at 7 stars . If I need to watch videos then im done with this game
Not all characters are created equal though. Checking out guides is a good idea. Dooku lead is a poor choice against Padme as he grants counter chance. When Padme's team are hit with out of turn attacks/counters they gain bonus protection, which turns into Courage, allowing them to do more damage to your team.