Gil Spam

[Felis]

If SE wouldn't design crafting to be as tedious, grindy soul crushing and RNG infested (Hello 16% chance overmeld with materia @120K gil a pop) then we would not have this problem.

Materia melding have nothing to do with level up a DoH class.
just buy the needed items for the leves and GC from the MB, if crafting them yourself is too much for you.
Also, you can buy materias from the Diadem shop, if they are overprized in the MB.