Extremely misleading post.
It's an OGRE SK. Guess what? Just about every class in the game has trouble killing those. Why don't you log on a warrior, monk, or rogue and try fighting him next so you can get the same result. He could probably kill 3 rogues at the same time.
SK have a +40 cold resist buff too. It's basically the worst class you could fight as a wizard and you use that as an example. You also have enough mana for at least 4 ice comets while playing a low intelligence race instead of DE.
Anyway, nobody even posted anything about 1vs1 balance. People posted about CC spells being used to zerg down targets for free kills like the Rexx video:
http://www.youtube.com/watch?v=Uo1hmS4H5Rk