Reno mage is one of my favorite decks, I like singleton because I can put in all of the different cards I want to play a not feel too bad about the deck quality. That being said, I average rank 12 with these kinds of decks so this isn't one to make if you're looking to win all of the time. I try to always put in cards from the new expansion, and Saviors of Uldum adds a bunch of great cards to the deck.

Usually I win against aggro by making it to reno/frost lich jaina, combo by using dirty rat, and control decks I try to fatigue out with kazakus, archivist, and brann+zola/echo of medivh.

Muckmorpher is a tech choice to combat big priest, and if you can get lucky with a kazakus potion for mass polymorph you have a good chance of taking them out.