HoS: Definately VERY hard to do the event. A Paladin helps a lot to pick up the Mobs at the door before they aggro the NPC. This way the achievement could be done quiet easy. I think this event will get MUCH easier with everyone getting better equip
Two of my guild got the undamaged Brann achievement off this the first time they ran it. One of them had dinged 80 less than a day before. I submit it will get a lot easier when you stop partying with bad players.