Thanks for the tip! I will try the LOS method next time it happens. However, it often happens when I don't have any aggro so we'll see what happens.

As for Ichoron, I haven't been able to down her yet. Been very close, but still working through the explosions knocking my guys all over. My toons often end up all over the place even when I try to keep them near the wall as in Hachoo's video. I think I will get it next 1-2 attempts, just sucks that I have to keep clearing the instance to try it.

Ichoron and Xevozz still give me the most trouble.