Wise to the World/Eureka Moment

[Jojoya]

I see people using "Solid Reason + Wise to the World" so very often when gathering the new mats. I checked their gear, and they have stronger overmelds than me, which puzzles me a lot...

They do it for the extra spiritbond. Mat yield is more consistent with what you list but for someone trying to farm materia for the next round of advanced melding, it's worth losing a few on yield to get spiritbond completed 50-100% faster.