I dont know if this would be an exploit or more of a guide. Feel free to move it or delete it based on its usefulness.
In WG you get an invulnerability buff at the GY's when you die. As long as you stay in the GY you dont lose the buff. As a DK, when opposing faction is attacking East or West Vehicle Workshops, i woiuld wait for a pc to get close enough to Death Grip. For those without the heads up, they will more than likely continue to attack you (Pallys and most melee dps will anyhow), meanwhile you are invulnerable to all their attacks and you can burn em down.
Using wow infinity is also an option to get up on the gy platforms, if you get behind it in time to where they cant see you climbing the unclimbable wall. =)