If the 5 people not holding the relic have black hammer, you can take him down straight away, first time, one teleport. No problem. An experienced team will smash through the oracles, get to the middle and pop the shield quick enough to allow over 20 seconds of times vengeance. Pop a weapons of light at the back, black hammer will then do 20k+ damage per shot, if you don't miss, you can land 12 to 15 shots comfortably. 5 people, 12 shots, each with 20k damage, Atheon is in big trouble!