Wow, worst skirmish loss I've had as Rebels. Had Dalia supported by Luke against Vader supported by a Royal Guard, basically like this:
R
VDL
Twilek already had a bunch of damage. Imperial player smiles, activates Vader. Plays force lightning which kills the heavily wounded Twilek, and causes Luke a couple damage. Then Force Chokes Luke for two more.
I activate the rebel gunner, can't remember his name. Use his assault ability for two shots on Vader, small amount of wounds. He activates the Royal Guard, who was previously focused and rolls godly against Luke, killing him. Mission went way downhill from there.
Normally I try to avoid Vader, but we played Get To The Ship, which ends up very close quartered. So, I had no choice but to try to face him. Bad news man, bad news...