I beat this at lvl 80 g8. Mods on Luke were the most important factor. I gave him a lot of speed and critical chance and he blew through it. His basic was more valuable than his special, because between han taunting, Luke's speed, and his 40 pct tm gain I could just repeatedly fire away. I did use his special when it made sense, but most of the time I saved it because I knew his basic would get me through before they could attack again.
Oh and I screwed up and used Luke as leader, so I didn't even have the off/def boost from Han.
I am not bragging, just saying this event can be torn apart with the right setup, and it doesn't take a crazy amount of gear. Speed and critical chance on Luke, make Han tanky, and upgrade Luke's abilities as much as you can and you should be fine. I had some pretty good mods on Luke, but since I screwed up the leader choice and won with plenty of room to spare I would say there is some wiggle room there.