http://deckbox.org/sets/649163 - Defend, and control enough to draw for Aeon Chronicler or Stormgeist.

http://deckbox.org/sets/649164 - Everything revolves around milling the other player's deck, and the chance to take their champion creature from under them.

http://deckbox.org/sets/649165 - attempt at a third more agressive control deck. Looks on the passive side still.

Blue is the one I've used least on it's own. I prefer the magical combination of red/blue. Understanding the myriad ways in which this color can control the board seems easy. In practice it's much more difficult.