3: UAV
5: Airstrike
7: Stun (Stuns their whole team, so it temporarily makes them slower and unable to move quickly and makes everything all white and stuffz)
15-20: Enemies can only use their pistol. (If they have overkill then they get whatever pistol you start with in the game onlnie.)
Or you can swap the 7 and 15 killstreak ones and still have a good result...