You should double check your spells. Stonra/Aerora are Conjury only. So using Stone and Aero by themselves is completely useless. Their enfeebles are just as useless since they don't last long and they won't after the first use.

Any spell, any ability is a copy of another that point is dumb. Stoneskin is just a more effective limited form of protect, attack spells are just over-glorified ranged attacks with visual effects. Damage is damage, buffs are buffs, enfeebles are enfeebles.

A better solution: I have stated it quite a few times already.
Two, points I agree with.

Black Mage only: All elemental spells that act like Conjurers Combo lines. The first spell is always single target. When comboed the second spell is converted to single target as well but is also enhanced by Intelligence to do more damage. Using any Tier II spell or higher should be AoE. Drop the god damn worthless enfeeble spells of the spells cause they are worthless with this enfeeble system.

Change Flare to Firaja, Freeze to Blizzaja, and Burst to Thundaja. They aren't ancient magic spells. They are just lesser versions of the other spells. Ancient Magic spells like Flare and etc have always been pure damaging spells not dumb enfeebles.
I think they're pretty tightly married to the 15+10 abilities for class and 15+5+5 abilities for jobs. Knowing that, why don't you theory craft how you would set up Thm/blm ability list? At least it's not just ranting with an idea here and there, put it all in one package.