Quote Originally Posted by Ferth View Post
Where did you get this information about craftsmanship and magic craftsmanship?

It doesn't correlate with the info provided from 10/29/2010 Ask the Devs! - Synthesis.
Sorry that English is not my first language. I've double checked the Devs' post and you are correct. It said craftsmanship help on some synthesis and magic craftsmanship on some others. Both of them have identical effect, that is to increase the success rate so to increase the progress.