I won!! Actually, I just finished GW (barely).
I had some really low toons for a last ditch suicide squad with Poe and a 1* RG that is gear 6. RG and Poe survived long enough to get some of their specials off which is good since Sids AOE almost took out the lot.
QGJ lead went back in with Poggle, GS, JC and Daka (I wanted to save Lumi/Sid). QGJ/GS took on Sid. Poggle got his ability block finally on Barriss which let me finish off Sid. Barriss got her heal off once when I was going after Phasma but AI was on my side for once and left JC alone so I kept using his heals.
I ended up only losing Poggle and Daka (she never self revives for me). Daka never got a stun to go off but her heal kept GS and QGJ alive right before Kylo took her out.
Next two nodes were hard but not terrible. By the end I had also lost Han, GS, Lumi, and JC. Sid did the most work and Opress finished off Kylo as the last standing but both Sid and Opress were hurting. I just had Phasma, QGJ, and Talia in reserve in case I needed to go one last time.
All my GW credits are going to Lumi right now.