Power the Glyphs/Warpriest
Why? Because people are stupid for the first half hour and shoot the Acolytes or try to sit with the Acolytes and someone throws a grade or someone shoots their Fireteam member but misses and shoots near the Acolytes.
The Warpriest is hard because people are not optimistic and don't want to go four rounds and say 'wipe' if they only do 1/4 of damage.... They also don't go to centre with the red bubble of doom (as I like to call it) and makes everyone go up to the highest spot...
[spoiler]#LifeisRough...[/spoiler]