If you’re focused on GAC, at your stage of the game, having more total solid teams tends to matter more than having fewer higher-end teams (this changes slightly in mid-game). I’d bring them all to g12 and see if they’re accomplishing what you want/need them to. If so, pick another faction and bring them to g12, and repeat this same question… are they doing what I need them to do? If so, stop gearing, and if not, keep pushing them higher.
Modding this team well is important to getting the most out of them. You want Speed on Revan (goes first and marks enemy), Offense on Yoda (check out his basic, he gains SO much TM when you call him to assist that speed is meaningless to him on this team), potency on Bastilla (her ability block on basic can be pivotal, same with her stun/buff immunity with her special), tenacity on Jolee, and health/defense/protection on your tank… make them tanky (General Kenobi makes the best tank on this team, Old Ben gets the nod for second best).
I disagree with the poster above, I recommend bringing Jolee to relics first actually and Yoda second.
Jolee can revive your ENTIRE team, and is extremely tanky when modded correctly (FULL tenacity sets, 6e tenacity cross. Please check out his unique if you don’t know why).
Revan can automatically self-revive if your enemy focuses him down, which effectively gives him double his starting health & protection.
Yoda is your damage dealer and you’ll want him to burn down your enemy’s biggest threat as quickly as possible, which is a proxy to gearing up your entire squad for survivability’s sake.