Abjuration 15
Conjuration 5
Divination 20 (-2)
Enchantment 10
Illusion 20 (+1)
Transmutation 12
Voting on a couple new schools before I have to start repeating, Illusionists were a subclass before there were subclasses, and 5e's iteration does an excellent job of supporting that playstyle.
And while Divination has a long history in literature, retaining the inevitable yet unpredictable nature of classical prophecies (as in Oedipus, for instance) seems at odds with preserving player agency and creating a mechanically effective class.