Run Exclusion Zone mission on heroic. Run to bunker, before you activate your ghost to turn that switch on take a Cabal consumable. Then activate. Clear out first wave (I usually just throw a grenade then pop quick headshots) then move out the door as soon as your done to initiate next drop ship. This one has the majors in. Take out [b][u]ALL[/u][/b] of the yellow bars (again, headshots are easiest, or two shots with a fusion) and kill all but one Phalanx. If you kill them all you will start a new checkpoint. If you're having trouble dying (sometimes Phalanx just won't kill me) just grenade yourself or rocket launcher yourself. You will spawn back with the doors opening on the first wave. Rinse and repeat. [spoiler]Remember to take another consumable when 10 minutes pass. This is an easy way to get 10k+ very quickly.[/spoiler]