Arena help - Poggle/86/GS

Hi all. My arena team revolves around Poggle, GS & IG-86 but I'm not sure who else too add. I've had good results with Sid (lead) for the crits and also Phasma for TM. Also Lumi is good for the heal so not making much difference. I'm farming 88 so will then go Poggle lead and add in Poe

I also have QGJ nearly at 7* and when he's complete I will 7* Poe and then probably Daka. Dooku is only on 5* but max gear and ability - still too squishy until 7*

Some advice would be great. Thanks