Originally Posted by Caribald

The only mob that does any real damage is the Sunblade Slayer due to its percentage based DoT. For the packs that have that mob you'll want to either burn it down right away or use Freezing Trap while you kill the rest. If it casts the dot (I believe it's called Slaying Shot) on you, you need to Intervene - if on your pet, use Shell Shield or Cower. It should never be allowed to cast it more than once per pack and Intervene will be ready for each pull.