I 2v2 while dual-boxing 2 mages. It can work, but it requires you to be flawless in your burst on the first opponent. If you can get the first opponent down with both of your mages still standing (even if one is close to death. insta-invisibility + glyphed evocate ftw) you should be able to walk away with a win almost all the time. It takes a lot of practice though. A lot. I'm finally starting to get a bit better with the two, but its taken longer than I would have liked to stop feeling completely inept.

Also, if I were to suggest anything else, it'd probably be dual hunters. I think two pets + two ice traps to keep melee off of you while you're burning one down would be pretty cool.