Start at the Imperial CP opposite from the Rebels. Don't go down into the arena. Press "Follow Me" so a couple of your mindless bots will follow you. Go around the outside, go behind the Rebel base, and flank them from the rear. Be sure to be a regular stormtrooper. Keep throwing grenades. Capture the base, and you really have them surrounded. It makes the battle really easy.
"Meatbag!" -- HK-47, KoToR I
"I find your lack of faith disturbing." -- Darth Vader