The idea of breeding het to het is not so great. Each hatchling only has a 25% chance for a visual. And a 75% chance of being a “possible het” which are practically useless for breeding, and can only be sold at the low price of normals.
If you want a visual axanthic combo, buy a visual axanthic combo. It is silly imo, to breed a whole clutch of snakes, just to hope for a visual axanthic lottery. And then have a bunch of babies you will have to give away.
What is your goal in breeding pythons? Money? Getting a huge pile of snakes to take care of just fun? That is a lot of mouths to feed, and a lot of money and work spent, when you could just buy whatever morph you want.