Thaumturgy is pretty dark
^ The quest for thau are anyways, though to be fair - the conj quests dont really seem very white magey on their own either, they seem more like elementalists or something since they are always so keen on emphasizing the sacredness of the wood and such. If SE is considering doing advanced classes, I think Conj would better fit Elementalist / Black Mage with the spells they are using.... (if anyone played FF tactics, elementalist had healing spells as well - granted they weren't named Cure ).

As for Thau i have NO idea... their spells are so much like rdm/drk i don't know how that could be divided up while still keeping it predominantly a mage. To be fair i never played Scholar, are any of the Thau spells similar?