There's some pretty big leaps in this thread. I think it's hard to argue that at least when it comes to the mages the most logical assimilation is CON => BLM, WHM; THM => RDM, DRK.

BLM WHM because clearly they have the -na spells, protect and shell and elemental nukes.
RDM DRK because they debuff, cure and absorb, just cuz drk was a warrior type in one game doesnt mean they can't make dark mage or death mage or w.e ffish they want to come up with. I don't really see Time Mage as logically stemming from THM, maybe Arcanist though, so I'm still on the boat of ACN and MSK are planned 'classes' and not jobs.

then again im just speculating too.