What I have not seen the game changers show yet is a bastila led team with making sure she goes first. You get your five Jedi team to go first cause Bastila, Then use her assist on GMY, GMY will go next no matter what his speed is, he then spreads all the buffs to everyone (Again, no idea why they don't do this), Which you follow with the others.
I'd focus on Sion first cause really, what the Jedi need against the meta is a way to make all of their buffs un-removable, Sion gets one turn not ability blocked you get reset to nothing. Take him out first round before the entire opposing team gets a turn, means no worries about losing it all. (though really, unless the AI is smart enough, more often then not your player led Sion will get his ability off, so unless the AI gains intelligence, a ability to make buffs un-removable would be key for defence)
Plus then they use their aoe's, ability blocking the others is a bad idea since Yoda gives Tenacity up, which makes you immune to Vaders/Palps/Nihilis first turn. Only worries will be characters like Thrawn or Traya. But really, getting a stun on Nihlis afterwards to stop his basic would give your entire team lots of turns with all the buffs.
Fulcrum could special the buffs away then regain them all on her next turn, That's a lot of damage from her.
I can see Old Ben also being useful here, purely because the AI always makes him use his tm removal first (which can also apply ability block, I mean it can be a good thing to do that, just wanted to avoid Nihilis basic
and until Bastilla's tenacity from her leader is fixed as it appears to not be working, relying on Yoda's tenacity buffs seems to be key)