Planetside 2 – Engineer Repair XP Guide
I guess this could be considered an PlanetSide 2 exploit, although I would probably consider it being bad programming by the developers more than anything. Basically you get into a ship and can do one of two things. Either go to an enemy territory that’s restricted, fly in quickly then land and repair to get XP. Or land on a slope that slowly damages your ship as it slides down repairing it the whole time.
Below is the Planetside 2 video that shows how to gain lots of XP per hour using the Engineer class. The author claims you can make 16k XP/hour using this method.