This is a fun deck IMHO, but maybe not great to play against, it can be pretty salty to have your topdeck fiddled with, for some decks this is backbreaking.
Anyways, Orcish Lumberjack is the all-star of this deck, enabling a turn 2 Mwonvuli Acid-Moss, which sounds decidedly similar to a 1 mana Sinkhole, and if I put 2 Avalanche Riders back in, it also works with Lumberjack, but if I do this I'd need to bounce Wall of Roots for Ignoble Hierarch, since I'd want another card I can play for 1 mana to follow up the possible Sinkhole effect. If I followed up with ramp that turn, I could easily play a Plow Under the next turn, which would not be a pleasant experience when you're already down a land, and it is probably nastier if you can hit them with a Stunted Growth if they still have enough cards, I think I'd scoop to that in almost every deck, even if they've just got 3 weenies out. Having a floor of turn 2 Stunted Growth sounds reasonable, and Plow Under turn 2 would be worth going down a land (provided I drew lands/ramp to make it up).
So, thinking about Rider, Hierarch and maybe splash in some Black to deal with creatures bigger than mine? Then it's to the sideboard, where I would shove in more removal, graveyard hate and a bit of who-knows. Probably should have Endurance in the side, if not the main.
