Rogues are too OP?

[Adienl]

Hi,
I am fairly new to the game, and I have an endgame mage(with arcane ring, and some good pets like slobber, haxonite).
I've experienced while running elites(and arena!) that rogues with okay stats can finish the map really fast!
I also browsed through the forums and there is a lot of resentment against rogues being the best class.

I enjoy playing on my mage, but because of this notable difference between rogues and mage I am considering whether I should invest in arcane pets, mythic weapons for my mage or make a rogue lvl 46 and invest on that?
I'd like to make an informed decision, so please help out this newbie.
Thanks!