They fixed terrokk's downfall after a solid week of players grinding the items to summon him. Now that everyone has hundreds of time lost offerings they can wait around a skull pile to summon terrokk once every 15 mins or so and maybe if your lucky enough to be one of the 20 people trying to summon him to get a tag and finish your quest. TL:DR still a broken quest that should be addressed (maybe skull pile respawns when he dies?)