New or old ideas for viable f2p Lineup?

Hi i am getting to the stage of the game where i have more than 5 maxed out chars and therefore now actually have a choice who to use. I was just wondering if some of u guys actually discovered some working snyergies which may go beyond just using individually good chars. Maybe even a team that the ai does not screw up on defence. Please focus on ftp chars and lineups.
My team atm:
Phasma
Dooku
Sid
Lumi
Daka

It is really bad at defence i think as i drop a lot in rankings everyday
My roster also includes (maxed out or almost):
Ig 88
Luke
Kylo
Ig86
Poggle
Poe

Any suggestions are appreciated. Cheers