help with squad arena team. Top ten

Currently in top ten, I can most likely get top ten pretty easily. But I'm not sure which chars to stick with.
I have
Kylo and Fives level 74 gear 9
Phasma STHan Dooku sidious gear 8 level 73
Boba level 70 Gear 8
And currently don't know who to work on for cantina or squad arena. So help please lol