To keep it short, it is difficult to pull agro a lot of times as a tank in new world. This is especially the case if mobs are ranged and spread out like Ennead. The Tank tree for the greatsword is probably the most difficult to manage agro with since your attack animations are slow.
Would it be possible to put some sort of heartune that generates agro into the game? Giving it a range of 20 or 25 meters to generate 300% threat?