Two separate Craftsmanship stats shouldn't exist, in my opinion. If they insist on having them both, at the very least explain to us which recipes uses which stat, or even better, make each Disciple of the Hand use Control and either Craftsmanship or Magic Craftsmanship. Square Enix has this nasty habit of wanting things be needlessly complex, which doesn't make things deep, it makes them convoluted and leads to a lot of superstition, like facing a certain direction while crafting influences your success rate.