My guild finally completed this encounter after a few nights and multiple attempts. While the difficulty of this encounter is quite laughable, the pylons deactivating is quite obnoxious. We tried different ways of solving each attempt, almost every one listed in this thread. However, what we did that finally worked was praying to our Lord Almighty Tebow. We all kneeled and said a prayer to Lord Tebow and what do ya know? The pylons did NOT deactivate on us. Try it out. It worked for us!