First time I have had something to contribute here, not sure if this is the right section but I think this is an exploit as these mobs respawn instantly.
On the bridge just before the Pyrestar Demolisher
There are 4 mobs (Sunreaver Magus)
Sunreaver Magus - NPC - World of Warcraft
When these are killed and u move from one side of the bridge to the other, they respawn instantly. I know its not exactly game breaking but Isle of Thunder is pretty quiet these days so it's a relatively easy place to farm some gold.