Definitely an interesting idea. Sure, some of those skills could use a passing nerf and the support end seems a bit too heavy, but the spell alteration factor is definitely a cool concept. I definitely approve!

Would say too though that I'm not too sure about the name of "Magus" for the sake of translation purposes. Thinking Bravely Second got it right with "Wizard", but maybe "Sage" or something that wouldn't wind up as the same name found in Black Mage or White Mage in other languages.