Stap! Don't go for lumi. Poggle is a huge boost and has better synergy with your current squad. Replace JC to with poggle. You want to kill their glass cannons before they act.
With pog's buff dooku hits HARD. Phasma's assists are more powerful. Sid's AoE forces the other team to heal when buffed.
More importantly, he speeds up Rey's combo. If poggle goes first and buffs, Rey starts the battle using her third skill and one shots someone, if she goes first, she uses the second skill for a guaranteed dodge, while poggle provides the offense up buff she would get by herself.
Poe on the opponent side might beat your characters up a bit, but if they survive, you can win.
