Guild Wars 2

I’m looking to craft a exotic hammer for myself with the forge.
If i use a mystic stone with three rare hammers in the forge do i have a higher chance of getting a exotic than if i had used four rare hammers?
If so, does anyone know the %?, i cant seem to find it anywhere
I’m not even going to consider the mystic hammer instead as its loaded with condition damage which is useless for warrior’s hammer spec.

No, I did three pistols and a stone and ended up with a spear.