So I managed to get this out as their second side mission wave - the players rushed vader and stun locked him and killed him by round 3. I did not manage to wound 1 of them and the optional deployment died before it could move from the spawn thanks to blast 2 being crazy. I am really not sure what I could have done differently. If I parked a trooper near vader he got blasted for 4 to 6 damage each round so no defence dice - all the red troopers did was live long enough to get shot 3 times.
Any one got some advice for this? I am being smashed by havoc shot.