I have quite a few normal adult females. In fact I only have two non-normal females that are breeding size. But, that is changing slowly.
As I get more het and morph females grown to adult size, I will replace the normals. Just due to size constraints, I can't continue to raise the numbers of snakes infinitely.
I've been told that having 4+ normals to each co-dom breeding male is optimal. Right now, I'm probably well over that, depending on which females are right at breeding weight.
I want to eventually have only a few breeding normal females, with most being hets, morphs or the few fancy/odds that I really like.
I prefer to breed co-dom to normal, but will breed visable recesives to normals to get hets. My name is nothing so far in ball python breeding, so I can't charge preminum prices for hets. I intend to sell het males to people I know that need a break. The het females will either be held back, or sold at a good price. If no one wants to risk getting a het female from me, I'll be happy to hold them until I breed them myself after all. They can be replacements for the normal females I phase out.
I will eventually be concentrating on combos, but with my group right now, I haven't that luxary yet.
Hope this helps