Love the food idea.. But

16 is low for fire wave...

I think damage needs to hit more but be more restricted and accuracy be more defined.  For example;

Base accuracy no gear (hand casting) 20% chance to even hit

Fire blast = 12 + 1 per mage gear peice & 15% accuracy per piece
Max accurracy of 80% in staff and wiz set
Fire wave = 16 "       "

Then disable casts if melee wep is equiped.
This will make hybriding more dificult resulting in less 3 hit killing.

- accuracy of spells by 10% per melee/leather piece.
This will make casting in full rune less effective and provide incentive to wear mage gear.

1. RSC does not work like this at all, that magic stat you see in equipment status is useless, it only determines if you're going to fail a spell or not (higher the bonus less likely to fail)
2. What you're suggesting is a complete new combat formula for magic of which you'll HAVE to introduce new content and balance out existing magic equip stats if the magic stat is going to mean something with your suggestion.
3. I'm for your idea, but would want to see a content overhaul with magic as in the introduction of new magic gear/spells

Also I just realized with your idea that 99 magic would be useless as you say nothing about an increase mgic level g
iving any benefits at all

Personally i wouldnt add content as that could complicate it further. 

Magic equipment stat turns into +1-4 and def etc stays the same as current gear.

99 mage is already useless as 90 or less is sufficent to not fail spells

Hope that covers every thing

Each to their own. No need to rant lol