Flying Reconnaissance Quest

Hi, I'm stuck in this quest in the 5th Step: Lure the Tursin Loudmouth Boss to Meteina. The moment I get near Meiteina the Tursin Loudmouth Boss starts running away! Can someone help me please?

 

Try hiting or agro him with taunt to make him follow u further? Dont know, never did that quest

 

Uhm I had that problem too...when I was almost there he lost the aggro and returned to his spot.
After that try we gave up cause in the meantime all the rest pf the foes had respawned and the reward wasn't worth the effort, so I just have one try to testify. No idea why he loses aggro all at sudden (we were hitting him and staying right in front of him all the time not to lose him so...) could as well be bugged, I wouldn't be suprised.