Just the name alone means "to bring forth" or "summon" .. not to mention the whole deal with shaping and control elemental energy. Granted they did give CON a ton of white spells too. So I see the advanced jobs as Summoner/White Mage.

Black mage should be off THM imho. They have some crazy burst and the ability to hit all/most mobs with that cast.

CON AoE doesn't lend itself well to large scale encounters for DD or heals unfortunately.