Take in trash or spare teams to get Rey down to yellow health, have her burn saber throw and either time out or die when health is as low as possible.
With the counter team.
shield mod to Thrawn, if thrawn takes a turn fracture Rey, if not keep going. Make sure vader is slow enough to go after Wat takes 2 turns.
Attack mod to Vader, use Merciless Massacre. AOE on Poe, Saber Throw on Rey (should kill in one shot), basic Finn. Kill either Finn or Poe depending on who has lowest health or more DOTs.