Proposed Rework for ryze or a potential new champion

My Proposed idea

Passive

1. Ryze's auto attacks act similar to Jhin in the fact that it has a set attack speed that cannot be increased by auto attack buffs or items.
2. he is allowed to auto attack 5 times within one magic host then he will need to reload in order to auto attack again.
3. while reloading, he gains a movement speed boost and loses 10 mana (scaling with level).
4. 70% of ryze's auto attacks damage do 60% of his AP as magic damage and count as a spell cast per auto.
5. ryze's current passive of gaining AP equivalent to his mana is still there, however he does not gain a shield every 5 spell casts.

His Spell Kit Whenever Ryze casts a spell other then his auto attack, he gains another auto attack charge.

That's all I got so far, and i'm open to any suggestions the community may have. Also would like some feedback on if this is a viable or if this has already been suggested or even tested before.