Chronomancer / Chrono Mage / Yellow Mage

Specialty: Time Based magic/ Fighter mage

Spells: Haste, Slow, Stop, Hastega, Slowga, Stopga, Nullslow, Nullstop, Break
Breakga.

Job Traits:
Time Lancer: Resistance to Stop and Slow
Time Resist: Decreases the amount of time status effects affect you.
Time Strech: Increase the amount of time status buffs apply to you.
Compression: Increased MP recovery while healing.

Job Abilities:
Chrono Drain: Casts haste on yourself and slow on an enemy.
Status Lancer: Increases the amount of time status effects affect the
enemy.
Speed Lancer: Increase the amount of time status buffs apply to your
party.
Gravitation: Casts slowga and Bio on the enemy.

2 hour ability: Manipulate: Freezes all enemies in range of the mage for 30 seconds. (No aggro, no action)

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This would be a perfect partner for a WHM or a BLM. Imagine this: WHM casts Protectra, followed by the Chronomage casting Speed Lancer to increase the time the party keeps Protect.

Same with a BLM. The BLM casts poison then the Chronomage follows ups with Status Lancer.

The 2 hour ability would help parties escape trains, find camps, take on multiple enemies, anything that would involve stopping a given enemy in the AoE. This would be especially useful for the Promyvion missions, as the upper levels get crowded. Imagine just stopping them all for 30 seconds. Enough time to nearly reach the spire eh?

NOTE: This is just my own little thought and there is nothing suggesting that Squar Enix has any hint of such a job. I hope you enjoyed my little thought. I appreciate any feedback you have.