You can mate any of these snakes to any other. It depends on what you want and how many males you want to use.
Here's what I would mate.
classic male x anerythristic aztec. As far as I know, aztec is not motley, so I'd keep it separate from the motleys and stripes. This would test the male for anerythristic, too. Otherwise I would expect normal-looking babies.
anerythristic male x snow female. This would test the male to see if he is heterozygous for amelanistic. All the babies would be at least anerythristic.
amelanistic striped male x snow motley female. This mating tests the male to see if he is heterozygous anerythristic. If not, then all the babies would be amelanistic and heterozygous anerythristic. The babies would also have a motley//striped gene pair which would produce more or less motley looking babies.
That leaves the ghost female, the blizzard male, and the unsexed ghost motley.
If the ghost motley is a male, I'd mate it to the ghost female. This would make ghost babies that are heterozygous motley. It would also test the ghost for motley. I would not breed the blizzard to anything. And I'd try to pick up a charcoal or a blizzard female to mate to the blizzard in a later breeding season.
If the ghost motley is a female, I'd mate it to the blizzard male. This would test the blizzard for hypomelanistic, anerythristic, and motley. The mating would also test the ghost motley for amelanistic and charcoal. All the normal-looking babies would be heterozygous for 5 mutants. And the ghost female could be mated to the anerythristic male to make anerythristic babies and test the male for hypomelanistic.
That's what I'd do. You might prefer other results. Post with what you'd like to get, and either I or someone else can tell you whether it is possible with what you have.
Paul Hollander