No reassembling skeletons? No puppet conjurer?
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If you're using the zendikar lands, you may as well run hedron crab.
Get rid of Jace. I'd also recommend some kind of tutor if you want to make sure you grab the crawler.
Viridian longbow is faster and better for the purpose. No need to waste a turn arrow counter'ing when you can just kill every turn, and with one less mana spent.