I played against a deck a bit like this in MTGO that used Winter Orb with a bunch of snow lands and tap/untap effects to lock down the other side of the board as well as untapping their own lands. Just something to consider; the deck looks good as is.
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I could see the mana getting a little iffy for this deck at some points, but the Smokebraiders should definitely help that. Looks good.
I'd definitely consider switching out the gilders and possibly the Llanowar elves for more land searching. Maybe Search For Tomorrow, or Greenseeker?