Try staying Darth Vader. He can easily sprint from the bomb to the bomb planting area. Now after you have planted the bomb, stand back. Most of the Rebels should go after the bomb and not you. Use the lightsaber throw to take them all out from a distance. If you die, come back and throw gernades into the area where they stand. Don't be a slow firing unit, such as the rocket trooper, you need to kill large amount of units quickly.
(I may not agree with thoughts posted under this name)
Looking for a mature clan? Checkout www.rdhclan.net
email/PM me for more info