All decks can be played several ways from my own testing. I wont talk your ears off here is the math.

25+ cards between 1 land - 3 land to cast. Fill the rest 4+. A rough mix between 55 %- 65% creatures and the rest other. I aim to keep my decks to have high burst right out of the gate. So having a lot more low casts really helps keep you afloat no matter what cards you draw.

-Added Duo Note- You can work with another player over steam to get an idea of the deck builds you want. To be better able to work off one another. And you can make some really STUPID deck builds that are aimed only to be played with your duo partners deck. Stupid deck build is like using the white/blue deck and taking all the blue cards out. Its fun but you need someone you can depend on in game to play that train wreck.

-Added- Not all decks are the same clearly. For instance the the jace deck and the red/blue deck. You are going to find yourself using the theory in reverse. And use less creatures than other.