Do they actually instakill, or do they do something like 9999 damage? I mean an i90 WAR can survive meteor by KB or Ancient Flare.
Pretty sure it's just instakill, no damage is shown in combat log or on scrolling text, unlike things in CT like giant's 9999 cleave and meteor. But I so rarely get hit by either because both are so easy to dodge that I have never paid super close attention to it. If you get hit you just fall over (or fly up) dead.