Ideally for turn 1 you'll want Argent Squire or Light's Justice. If not available play your hero power on turn 2 or Ooze if your opponent is not a weapon class. Don't be afraid to sacrifice health to clear the board with your Light's Justice or other weapons. Aldor Peacekeeper is a key turn 3 play if your opponent has loaded the board with a 3-2 that is proving troublesome. Sword of Justice is also a nice turn 3 if you can get away with it. Baiting out an early removal with a turn 4 Blessing of Kings is another nice move as it makes way for your real big hitters to avoid instant deletion.
This deck is based around winning after turn 6 so if you can reach that point in good shape you should have enough big drops and debuffs available to control the board and out damage your opponent. Take any opportunity you get to play Lay On Hands.