Hearthpwn

You want to keep Call to Arms/card], [card]Sword of the Fallen, Far Watch Post, Oh My Yogg!, Crystology, and Irondeep Trogg in your openers (if you know you are playing against a minion-heavy deck, mulligan Irondeep Trogg and keep Nerub'ar Weblord)

This deck wants to tax your opponent enough to out-pace them with board presence. Play Far Watch Post as fast as possible. When you have a decent-sized board, protect it with Oh My Yogg! and/or Redemption. Play Call to Arms when able, unless you already have a decent board. In that case, keep it to refill the board if they board wipe.

As for what you do in the midgame (around turn 3-5), you want to try and build a very awkward boardstate for your opponent. Unfortunately this isn't as cut and dry, as depending on the matchup you'll want to build up your board differently. Against a battlecry shaman or OG quest rogue, getting 2x Nerub'ar Weblord and a divineshield+taunt guy is a beautiful thing. For more controlling decks, 2x Far Watch Post with one or both secrets is great. For spell-heavy decks a single Irondeep Trogg and a divineshield+taunt is perfect, throw in another problematic card for even more awkwardness. If they cast a spell to deal with a Far Watch Post for example, you will just get a Irondeep Trogg in return. It gets very hard to deal with ALL of your board at once, so emphasize that as much as possible.

Crabrider is your main wincon, buff it with Conviction and Blessing of Kings. You can push enough damage without Crabrider though, so don't feel like those buffs are exclusively for the Crabrider.

If you have the dust and are looking to upgrade, I've hit Diamond 10 by removing both copies of Knife Juggler, adding Leeroy Jenkins  as well as one copy of Annoy-o-Tron. Hitting Knife Juggler with Call to Arms always felt awkward, getting an extra divine shield + taunt minion seems to make it hold up better against token-focused decks. Leeroy Jenkins has proven to be as useful as ever, pushing that last little bit of damage needed to get a W