Full Metal Sorcerer (but don't look too sternly at him, or he might lose his mind)

[Arbane]

Actually, how would you say that the Witch spell list compares to the Wizard / Sorcerer one? The Unlettered Arcanist seems to stack with the Blood Arcanist archetype, and the imagery of a super-mongrel mage is pretty funny: An Arcanist with a Sorcerer Bloodline, that casts Psychic Spells from the Witch spell list, and who dabbles in the Oracle mysteries on the side - all single classed. Y'know.

The Witch spell list is MUCH weaker/less versatile than the Wizard's. But then, so it everything else in the game, so....