Math Magic

I have studied the math of Magic, trying to come up with a formula for deck construction. I tried 24 land 9 1,2,3,4 drops and that formula works very well. I try to include 4 card drawers and four extra mana producers. I found a formula that works even better. 5 1 drops, 9 2 and 3 drops and 13 4 drops. Using this formula, after turn 4 I can drop a higher casting cost card every turn.