Warlocks are getting mostly buffs so they will be great for 3v3.
Mages will be slightly worse of compared to 5.1 but still very good.
Boomkin has always been gimped and only viable for 1 or 2 comps.
Go with Lock or Mage for best chance to get gladiator. All you need to add is your own and your teammates skills
---------- Post added 2013-02-12 at 02:38 PM ----------