Lady Samiel

Strategy
Have outside group healers or DD / have a high enough Illusionist or Coercer to mezz the minions / use an outside lvl 70 tank who takes the mob after you aggro. This is tricky though, as the group who needs the update has to do at least 1 point of damage AND unlock the encounter for outside help. All that has to be done before the person engaging the encounter is dead ;-)