There was a thread about this topic but it has been deleted at the time of this post. Dont know about elite section.
1. Go to fight zoltun kulle
2. kill adds
3. position yourself in the lower right edge on the opposite side
4. kite zoltun to the upper left corner and bug him to the small edge near the middle turn in that area
5. shoot until zoltun is dead
3 and 4 basicly happens at the same time. It helps to run towards the player position once hes in the upper left and he tries to reach the player but bugs at the edge.
http://imageshack.us/f/27/screenshot012ct.jpg