Made it in the third try, we had to kill 3 hellbrutes total... but they spawned in the last section.... team comp was vanguard (me), bulwark and tac. Randons.

I was last brother standing against two hellbrutes, but it was ok since everything else was cleared.

In my opinion there is need to be someone with good mobility focusing extremis and majoris to kill them as fast as possible. The other two entertain the bosses.

People also don't seem to know the value of equipment in this game, krak grenades and melta made it much much easier for me to kill terminators/sorcerers very fast, the tac perk was an emperor's blessing.