Quote Originally Posted by Crossblades
It is useful. The fact that you can heal and haste is a huge plus. My Reina mastered both of these jobs
Definitely a great combo. In fact I had at least three characters master or almost master the time mage job. This is one of the only FF's where I very liverally made use of time magic, and it made a lot of the fights much easier. Haste is awesome, and having comet and meteor at your disposal is great as well. Regen never hurts either for that matter. I don't think there was a time after about the half way point when I didn't have at least two people equipped with Time Magic.