Well nothing is this game is really difficult, just because it's the hardest class to play doesn't mean it's some kind of unmasterable ancient art. And if it turns out you're some kind of no skill down syndrome retard that can't figure out frost, you can just spec arcane and faceroll your way to victory with arcane blast.
My favorite WoW video of all time - Arcane Mage Arena - http://www.warcraftmovies.com/movieview.php?id=110657
Even if you don't have the time/don't feel like watching the whole thing, the first minute of the video should give you an idea of how stupid Arcane is.
XI Wiki


