Try to have two people. Both spawn as Republic Clone Troopers at the council CP. Run down the main hall and turn to the left where there should be a opening into a command post. There will be a TON of droids and you are probably going to die alot. Have one person cover while the other throws a grenade and vice versa. Eventually you will take the CP but there is a little bonus. Half the time you do this you will get Mace Windu (at least for me).