I imagine you know how the rotation works but just incase you dont, you can do it with 1 or 2 buttons dependong what passing program you use. Anyways you want 1 button press to cause 2 drakes to shock lance, 3 drakes to temporal rift, and the 2nd button press to flip that .. so 2 temportal rift 3 shock lance. It's all about the timing, usually the first volley doesnt cause any debuffs due to server lag, but you just watch his debuff's and wait until you see your dmg boost debuff on him and make sure your wait until it stacks as well. The 2nd thing that is highly important is keeping him stunned all the time, I do mean all the time. If you do your dps rotation right this is possible. Again you have to watch his debuff's because timestop causes a 10 sec debuff on the boss ( goes down with DR so the 2nd one is like 6, third one is like 3 ) but as soon as you see time stop is wearing off, hit another one ... keep him perma stunned. By the time you go through 3 stun's you should have knocked off so much hp that he is going to phase out and you simply do a 180 and run away. During the phase shift you want to pan around and watch the little arcane dudes, the 2nd they blow up do another 180 and get back in range of Eregos as fast as possible and lay another stun on him and its pretty much rinse and repeat.



This is how I always do this fight except when I had to get amber void and frankly, its a lot easier once you get it down this way. Also this is how I did it for "Make it Count".



Biggest things are

1) perfect that dps rotation, make sure your debuffs are stacking before you toss another volley ( except the first volley due to lag )

2) keep him perma stunned, watch the stun debuffs

3) get back in range of him asap after a phase shift