One of our rogues stumbled upon this by accident.
The other night in BT we cleared up to Shade of Akama. One of our rogues distracted the mobs around the Shade of Akama.
Thus, those mobs stopped channeling and did not begin channeling again.
When we began the event, the Shade of Akama began walking towards Akama. Only 1 pack of mobs spawned on each side of the room, Shade of Akama then initiated combat with Akama.
We were then able to attack and dps zerg down Shade of Akama and collect loots afterwards.
FTW.
-Alkhara Majere