Quote Originally Posted by tymora View Post
I go for the more general theory - The craftsmanship requirements for every recipe is different and every recipe requires a certain amount of both physical and magic craftsmanship to be optimal. (There is no way to verify otherwise because all tools have both.)
-> This means that it is also possible for some recipes to fail more if you focus too much on one stat and neglect the other.

The ones that I know of:
Magical:
Dyed Cloths (Weaver)
Powders (Alchemist)

Physical:
Shards from Fish (Alchemist)

Crafters should typically have 2 sets of gear - One to maximize each craftsmanship.
I don't have space for a 3rd set on Control so I don't bother.
I don't really believe the shards from fish. I've ALWAYS maxed my magic craft while sharding fish, and never had problems.