Keep a taunt in play; you can ice lance on turn 1.
Going for extra mana is good if you already have the Doomsayer and a Frost Nova in hand; otherwise go for cards.
Vaporize is also really good for eliminating the 10-10 if you time it right.
Ice Block should save you in the last turn and I would definitely take the Shortcut.
This deck worked for me on the 2nd try.