One other way I could see it happening is simpler where each ability having a baseline damage potency that is increased if farther than 15 yalms away for spells and less than 5 yalms for melee. This way would only require maintaining a chainspell and the positional attacks might combo together like a melee, but with spell-melee-spell instead, and the positional moves are used to make sure you get the max potency for each skill in the convo with less down time then manually running in and out, or just simply as part of the combo itself.

Regardless, Im super excited for red mage!