I do recall doing one of the missions out toward the Iron Horse Mine where our team faced a Lvl28 monster. It was pretty comical, we couldn't kill it as it kept healing all of our damage. 8 peeps and no spells to counter.

Well, I finally took off and we went and picked up the dwarf Rangor (?) and brought him back with us to complete the quest. With his help we took down the monster.
Funny thing, it wasn't my quest and I've been back through that area and done the quest over with only npc's, helped others and I've not seen that LvL28 monster again.