I now run Melee (main) and Warlocks (second team) - I play wPvP so slightly different but the Melee team are by far best.

I just bind IWT (and ensure key is set on WoW) to the main attacks and they pretty much chase targets around themselves. At first you find they "run through" their targets when combat ends but you get used to it.

Works very well, however in PvE they spin random circles endlessly around their target