Lol. There's no such thing as "the best morph" in the ball python world... There's expensive morphs, less expensive morphs, and relatively cheap morphs. The "best" combo to shoot for is one that you want to see.. Double gene morphs aren't as expensive as they were back in the day, so you could pick up double genes for the cost of some single genes, depending on the gender.

I'm not sure what the objective is in your question.