I agree with Mr. Hiatus. In T2, you essentially need to have multiples of some key cards in order for a strategy to work. Also, a lot of really good T2 decks are merely larger versions of similar T1 decks (the T2 National champion used a Disciples/Pharisees deck that was an expanded version of a popular T1 deck this year). So it depends on the cards you have, as well as the offense/defense you like to play.