If you do run the R/B or R/B/G version of sneak... I would run weatherseed treefolks, Crater Hellions... Darksteel Colossus... Main... I'm reverting back to sneak mode...
Remember that this is an alphabet deck... only 1 card per letter.
Can't have Crater Hellions and Contamination or Claws.
Besides Darksteel Colossus, hat other indestructable creatures are there? Perferably a lower CC.