Usually basic rule for melding is that when the item already has the stat, dont put a materia with stat anymore.

What I do for vanya is 1 try placing 2 crit materias in the first 2 safe slot. 3rd is accuracy or determination but since most vanya already have determination go for accuracy since youll be needing atleast 450 for coil.


For my crafted accessories i place crit and accuracy as well but when i reach the 450 accuracy goal, ill be putting either piety or vit in my xtra melded slots for accessories