I'm not sure that different values of CMC will work out nearly as well as 2, 3, and 7 do, largely due to how the numbers interact. For example, you go T1 land, T2 land + CMC 2, T3 land + CMC 3, and then you're left with interesting decisions. On T4, do you drop 2x CMC 2 cards, or do you play out...