User blog comment:RadioactiveH/Im hating on savages/@comment-24659969-20160503003139

Heavy bombardment is useless in boss killing. Bombardment usually only used to clear enemies behind wall; to kill enemies outside the train in Vaccine train-cabins phase, to kill enemies inside the lab rooms without opening the door, to attack enemies on the other corridor in pods map and the likes. That is why you only take 1 point of them. The main skill of Heavy is 1 level on concussion (or higher if needed) which allows for stun-locking the boss especially with high RPS and big clip guns along with Tough Body which able to reduce damage from anything including damage from enemy buffed with DM and Nightmarish (if any) armor pierce.