[quote=@vancexentan]
Alright I'm on my phone so instead if arguing further ill throw the ball in your court what would you have me do to present limits without hamstringing curse elemental and other traditional mages? No sarcasm all on you.
[/quote]

I'll admit I don't really know too much about Fate outside of the few anime I've watched, but I'm not sure there needs to be any limits other than "don't go too over the top/make anything too crazy". Fate is never going to be balanced, you can stop people creating God tier characters like Gilgamesh but some Servants are always going to be stronger/better in some areas and the same goes for the Magus. Someone is going to make an elemental Magus that throws around wind spells and is strong in combat, while someone else is going to make a Magus that focuses on creating Bounded Fields and performing large rituals who decides to play defensively; the former is going to win any fight between the two but the latter is well hidden and is working towards something bigger. It's all about your strategy and preparation and how you play to your strengths.

Honestly, I wouldn't worry about putting a system in place for Magus. Maybe put a ban on anything you can think of that is too strong, like you have for Servants, and stamp down on any profiles that go overboard and you should be fine. Fights between Magus are likely to be rare (unless we're in Fate/Zero) and decisive when they happen; they're all weaker than Servants anyway so it's unlikely someone is going to break the RP with their Magus alone.

In other news, I'm going to try my hand at creating my own Servant and I'm officially claiming the Lancer spot.