Mech units that can explode seem to work well. The dmg from exploding doesn't seem to get reduced by their buff currently. It makes the Darkmoon Zep or Mechanical Pandaren Dragonling very good. Decode gets you an extra round of attacking and you kill yourself at the end for good dmg. Darkmoon tonk isn't bad either as Ion Cannon is a good, I'm going to die anyway attack.