This was also my team, back at level 70. All 7* stars, except talia which was 6*. All had gear VIII
I used a ventress ally.
I guess I got lucky with stuns on kit fisto, between dooku and daka he never countered. Didnt even need to use daka's heal.
This may not help you but I used Daka as lead (for those w/o) with GS, 86, Dooku and Sid borrowing Phasma. It was one of the last 3 stars I completed but if you have a couple heavy hitters not quite up to maxed between Dooku and Daka you might be able to protect them enough for the 3.
It's best to borrow a meat shield like RG 7*.
This way he takes all damage, allows you to get heals off, and if he dies and everyone else lives you still get 3*
Replies
Phasma L, sid, dooku, talia, daka
greedo and nute dont seem as useful as the rest
I used a ventress ally.
I guess I got lucky with stuns on kit fisto, between dooku and daka he never countered. Didnt even need to use daka's heal.
This way he takes all damage, allows you to get heals off, and if he dies and everyone else lives you still get 3*