Without even meaning to, I've been leveling WVR and GSM together since GSM can make HQ weapon and accessories for my WVR, and my WVR can make some HQ gear for my GSM.

Looking at the list of possible cross class, Careful Synth II looks very nice. In the meantime, Careful Synth is pretty nice as I'm guaranteed progress without failing that portion of the craft.

Nearly 2 years later of having the quest locked, I finally can meld my own gear. So far it's only been level 1 crafting materia, but it still feels good to do my own.

Yeldir, your advice is duly noted, but if I cared that much about making money, I would have been in the crafting business a long time ago. I've had the game since ARR EA, and now nearly 2 years later, finally can meld my own gear. I'm in it because I want to have fun. If I make money in the process, that's a side bonus.