It doesn't seem like much at first, specially for the cost of the first 3 levels, but then you take into account it can be cast in places where you can't use a mount, and it stacks with the following:
*Destillate of Clarity potions, or whatever Enchanter mana regen buff you get, like KEI
*Your Level 54 self buff: Elemental Draw
*Your Level 58 self buff: Transon's Phantasmal Protection
This whole combo goes nicely with the Archetype, Spell Casting Reinforcement AA, so Elemental Draw is not a nuisance to keep going constantly.