Quick revive allows you to revive your teammates much quicker than without it. On solo it allows you to be revived after you have been downed. This perk costs 1000 on multiplier and 500 on solo. on solo it is already turned on and you don't need to turn on the power to use this.

Juggernaut allows you to take more damage and not go down.This perk costs 2500 points to buy. I think it is the most important perk to get.

Doubletap allows you to shoot an machine gun twice as fast as when you don't have it. It costs 2000 points

Speed cola allows you to reload your weapon twice as fast. It costs 3000 points.

 Mule kick is the newest perk and allows you to have three guns instead of two. It costs 4000 points.