At first I was unsure about how well Contract would work as a mechanic, but this deck went the distance with Alchemy Student, Battlefront Dasher, Tower Lookout, and Unseen Marksman. My main strategy midgame was to use most of my Power on one of the Deck's 3-Drops, and then using Contract to its fullest. Be careful when using Summary Judgment: I ended up killing my own unit, but it was also useful versus my opponents Hidden Units in one game.
The ShiftstonedEternal Power Calculator is a deck-building tool that visualizes your odds of drawing enough Influence and Power based specifically on the cards found in your deck.