There is no need to apply S100 if you are using Nattys (Blue or regular). Both are carnuaba waxes. You might want to wait 24 hours before applying the Nattys wax since the EX-P is a sealant and you want it to cure completely.
Most sealants like NXT..Klasse...EX-P and the rest of the sealants need a cure time..most are 24 hours....some Hi-Temp sealants say 36 hours....also best to do it when no rain is in the forecast..do not want it to rain during the night after you do your routine of applying the sealant
SSR are polishes. Which SSR you need is going to depend on the amount of correction you need. After you achieved your desired results with the SSR, seal the paint with EXP. Then top it off with natty's if you please. As everyone says on here, "It is all about PREP."