Jack a Wraith
This is a tough maneuver and you should be packing a Plasma Pistol before attempting it and some sort of scoped weapon -- and a Sprint armor ability if possible. First, find some cover near the Wraith and use a scoped weapon to eliminate the gunner behind the Wraith's turret. Now, shoot the Wraith with a charged Plasma Pistol shot and approach it as it becomes temporarily disabled. You may want to use Sprint to do this! Jump onto the front of the downed tank and you will see the turret area open. Press X when you see the prompt to operate the turret. As you take over the turret, the Elite piloting the Wraith will hop out. Shoot him and the Wraith is yours! Exit the turret and jump onto the top of the Wraith and enter the pilot's seat.