@Mobewan
I'm sure your much further in arena than I am, so what I do is a bit different.
I've got a g10 team of DN (L), CLS, Dooku, Palp and Thrawn, with Thrawn and CLS being faster than most my competition (which is mostly g11+)
Thrawns fastest, he fractures.
CLS goes next, using his special to remove all the tm of a target. Sometimes for the buff immunity as well. (sometimes, for his next turns I go to his basic and save call to action for when he takes damage or he throws out couple counters to spread debuffs. This has backfired before, but usually works well)
Sometimes an enemy or two goes.
Palp throws his aoe stun.
(I forgot when Dooku goes, he might go before Palp. Usually throws his stun)
Usually that start leaves a couple enemies stunned and someone with fracture, someone else with buff immune, letting me whittle down the dangerous ones and prepare Annihilate.
Now I'm sure what you bring to the table is better, especially against higher gear/ well modded enemies. I just don't understand yet cuz I'm just not there. But your advice has been processed and I'll keep it in mind as I finish getting Ben and r2 to g10