Horwath
Legend
Imho, for 'school' wizard, it should be one subclass and at 2nd(or 3rd),6th, 10th and 14th level just pick and chose school features.Crawford said in a video that the Necromancer was one of the 4 Wizard Subclasses.
Like current Totem barbarian.
Then just add:
War wizard,
Blade singer,
Runecrafter/artificer,