Quote Originally Posted by Sorel View Post
OK. But that would mean the BLMs (i.e. Thaumaturges) won't be the best at casting Ancient Magic like Flare and Flood because they would have less affinity with the spell than WHMs (i.e. Conjurers).

WHMs being better at elemental magic than BLMs?? That's what it's shaping up to be if your logic holds true. I'm not saying that your wrong ... but it would weird.
Once you utilize a job, it will (I assume) lock out certain skills while giving you access to others. So, on CON, since it is WHM, it will lock out the elemental spells and on THM, when you activate BLM, it will probably activate the elemental spells as BLM will have it's own affinity. See?