My God, some of these bastards are tough to kill! I remember one (I think it was Moreki) was by far the toughest fight I've ever had. His meteor-shooting staff, stupidly high health and fast movement (and not to mention his damn ward spells, that no mortal should wield lest they be ripped apart, made for my toughest ever enemy in Skyrim.
And he's really fast, too! Jesus, just give me a break! But I do love boss fights

Anybody else fear and respect these beasts? 'Caus I s*** myself when I find one.