Good Fighting, Good Loot in Gnome Mountain

Been spending Weekends with VMalice and gang in Gnome Mountain.  Been having a blast with the quest-line until the second heroic adventure. When entering the south side of the museum we are swamped with at least six to seven MoB’s instantly.  There is not enough DPS in the world to control that many.  Anyone have any thoughts on how to get by them?  I know its doable but can’t figure it out.