I been trying to buy and add materia to my Weavers gear in hopes of getting the 347 craftsmanship i need to make Vanya items. But im still only at 325. And if I try to add more Craftsmanship materia to my gear, it tells me i'll get only +1 or +0 craftsmanship. How can I get my gear enough stats to give me the 347 i need?