I need to say thank you for OP, since only due to his/her help I've unlocked 7stars chewbacca.
Here's my team:
NO ZETA
G12 BOBA (g12 item for more hp) - mod set up: critical dmg and chances (tenacity cross)
G10 ig88 - mod set up: potency around 90%
G10 cad bane - mod set up: potency around 90%
G11 dengar - mod set up: potency around 60%
G9 greedo - mod set up: speed around 235
I've tried for two nights in a row, making up to 500-600 tries.
Finally I've reached my goal in this way:
1) Resist all initial strikes of the rebel team, with no ability block on greedo and boba
2) Using Boba's missle, Greedo tmr and all the stuns on chewbacca.
In my opinion, having average mods with potency isn't enough, since I only occured a victory when succesfully stunning both chewbacca and han solo (after wookie's death).
After han solo died, I still had boba, dengar and cad alive, and that was enough for me to win.
I honestly hated this event: too much rng dependancy even if I recognize I was under-equipped.
