I'd love to see a time mage as a class, but even with support you can always lump them into a DPS role, where by buffing or debuffing others they add to the overall DPS.

Time and space magic would be a fun introduction to this game (if handled correctly) and for those who said Haste would not be introduced, well it is already in the game, we just don't have access to the spell, so here's hoping.