Spider is considered dominant. In thousands of breedings no super form has been found. Some people believe they die in the egg before birth or other stuff. BHB claims to have a super pinstripe but idk for sure, thats a topic for another thread. Anyways spider is considered incomplete dominant i think.
Pastel is co dominant. In a pastel x normal pairing every egg has a 50% chance of being pastel and 50% chance of being normal. In a pastel x pastel pairing the odds are 25% normal, 50% pastel, and 25% super pastel for each egg. This is co dom bc there is a super form. A pastel x super pastel pairing will yield chances of 50% pastel and 50% SP per egg. A super x super means all supers and a super x normal gives you all pastels.
Go to worldofballpythons.com and play around with the genetic wizard, itll help you learn all the different combos and odds!