So I ran the vault as a dps. Slow pulls win the day. Also keep an eye on your tank if you don't run this on a tank when dealing with the 2nd boss. Mine tended to point the boss at the group after he grew. They also would face them differently after each knock back. The good but I guess sad thing is they nerfed Mr. Filthy rats. I had less waves to dodge and they took out the tethers. All of my squad are 60 so that might have helped.