The other thread was derailed, and in order for the community to have a place to discuss tactics and walkthroughs for this difficult instance I created another thread.
Here is another bug that I discovered while trying to figure out some of the mechanics of this instance.
After killing these guys they did not turn into corpses and fade away, instead they stood there and were still able to be targeted. This prevented me from exiting combat and resetting my cool downs. Even after wiping and starting again these guys were still there. You can see how my character is still in combat yet the the next wave has not spawned.