I'd drop in Accorder Paladin over Leonin Skyhunter. Much more powerful knight. Here's my take on Knights.... http://www.mtgvault.com/ViewDeck.aspx?DeckID=172129
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Don't forget, Empty the Warrens. Cast a ton o shit, then goblin storm
Too unlikely of a draw. Think this..... Turn 1 - Mountain - Signal Pest Turn 2 - Mountain - Goblin War Driver Turn 3 - Mountain - Memnite/Ornithopter - Kuldotha Rebirth - Goblin Bushwhacker kicked Swing for 2+4+4+4+4+4 on turn 3