Something to remember is that you don't need to breed bee X bee to get a killer bee. You only need one of the parents to contain the spider gene but both must contain the pastel gene.
The odds of hitting on the spider do go up from 50% to 75% but with the wobbles in spiders I would advise against breeding spider to spider unless you were prove out homozygous spider (which hasn't been proven right?).
That being said a super pastel het axanthic X a bee het axanthic would be a much better pairing instead of a pastel het axanthic x a bee het axanthic or bee x bee.
Hope that helps![]()