Nah, Battlefront II is too easy in my opinion. But i'll help.
I'm assuming you mean the Mygeeto level, First, mainly use the normal trooper class, as they kill most infantry, follow arrow and capture cp. Shoot any enemies near it. DO NOT shoot every enemy you see, it'll attract there attention and you'll have more enemies shooting you. Go do some objectives, than play as Ki-Adi-Mundi when the option appears, do the objectives, slice enemies up, destroy generator after lowering shield and score! All these things you have to do for the level are explained when new objectives pop-up. If you need more help, than let me know and i'll go into details.