Moving will be made to interrupt spellcasting at a point in time...

[Dubont]

I have to question whether you have been in the Ifrit fight or not or maybe a successful Ifrit fight. The only time a mage needs to move in the fight is if he has to avoid eruption and a majority of the time trying to cancel a spell so you can get out of said eruption in time is very iffy.

If you are moving at any other time then your MP regen is going to be crap.

I have to question whether or not you actually understand what I'm saying...unfortunately, I already know the answer.