The best weapons for this level is either the flamethrower or the chaingun. Use the rocket launcher on the **** annoying ceiling guns. as ure running through that long driveway where u met HEAPS of vehicles the level before go into the room on the left and get the Tarantula laser chain gun (finally a good gun!!!) and use that to great effect. The hardest part I found was when u go up the lift and theres ceiling guns all over the place (about 6 in total on hard) and black hand stealth guys as well as acolytes and templars. First hit the two ceiling guns with your rockets then start looking for the black hand shooting your ass behind u. Get him down and then flame the LARGE group of acolytes,templars & black hands. Get all of them out then finish off the rest of the ceiling guns with the rocket launcher. Once u get outside use the sniper rifle while mobius toasts the officers with the chain gun (finally he kills something!!) remember to get the stealth tank or mobius is a gonna. After that go the GDI chopper and Gunner will grab mobius for ya