First, before starting anything, put on the invincible cheat code. Then as a heavy trooper of the Republic, walk up to a Droideka. Lastly, drop a mine. Watch as the Droideka blows up even with its shields activated. Repeat step two and three as many time as you like. This is a fun and interesting way to get points. If prefered to not use cheats, do so when you see a droideka walk or roll toward a predictable path, such as a doorway.