To clarify, I intend to add a "second tier" of sorts to wizard spells, basically better/worse versions of them that are locked for all but specific Wizard traditions. Hoping to make your chosen tradition stand out more. It promises to be a pretty massive undertaking, so I was curious if I was allowed to post the spells to get help with it. Not too important, I will see what I can manage myself, and only bring it to you all if I get stuck.
That is a crazy amount of work.
I highly recommenced adopting the "Tradition gets theirs better" idea if you do this. A Fireball is a Fireball no matter if a wizard, Cleric, Sorcerer, or even Fighter cast it; all classes use the same rules for the spell. And having one exception for a tradition is less to keep track of than having 10 or more exceptions for every other tradition. Although I think what you are trying to do would be easier if you reworked the traditions themselves.
Why not post the principles that you are wanting to apply? For example:
If you cast a spell of your specialist school:
- If it requires you to make an attack roll, you get advantage.
- If it requires the target to make a saving throw, you add +5 to your spell DC
- Otherwise, it counts as if you had used a spell slot one level higher
That sort of thing. Not saying those are the rules you have in mind, but tell us what yours would be.