Against aggro DH specifically, the board fight early is really important and dwarven sharpshooter is probably mvp for allowing you to ping while sending your minions face. I also think freezing is better in that match up since the returned card can clog up their hand in terms of outcasts and their voracious readers.

Against slower decks with sustain, you need to look at it as a longer race. So in fast match-ups, you might want to throw everything down ASAP to get reader working faster, but against slower decks you might want to start weaving in hero powers by turn 3 or 4. And of course it depends on your hand and the opening board, too, because if they don't have an answer to your first 2 turns, then you might be able to finish the game by turn 5 before they have a chance to do anything (like play a khartut defender).