Find a Bloodmaul Taskmaster and a Bloodmaul Soothsayer engaged in conversation, then use Rexxar's Whistle to summon Spirit to spy on them.
If the Mok'Nathal are tormented by the Bloodmaul ogres, then I will stop them and their followers. Ogres are simple creatures, and there is little profit they could gain from harassing the Mok'Nathal.
There must be something more to this. <name>, take Spirit, my hawk, and spy upon the conversations of the Bloodmaul's leaders. He may go undetected where we cannot.