On the Schools of Magic

Abjuration: A well-respected school among the Spires, particularly for its facility in manipulating existing magics. Built-in wards and permanent glyphs are important features of the Collective’s light rail system, among other infrastructure.
Conjuration: Frowned upon when not outright banned. Nobody wants another Crack in the Sky. While that incident was likely a result of attempted epic-level planar bindings (and some pact magic thrown in for good measure), it has tarred the whole school of conjuration with the same brush. Arguably the myriad of light rails, ships, and skyfoils across the Spires are able to thrive because wizards remain leery of teleportation, solely because it is of the school of conjuration.
Divination: Wizards have, fundamentally, gotten to where they’ve gotten by knowing more than everyone else. Divination remains a highly-respected school; it’s seen as the classy specialty for the discerning wizard.
Enchantment: There are wizards, certainly those of a political bent, who value the school of enchantment. However, because of its limited effect on constructs, it is seen as weak in the artifice-heavy Spires. Most wizards consider it dilettante’s magic.
Evocation: There’s no denying the awe-inspiring power of evocation. Among the Collective, however, using a magic item to create an evocation effect is considered to be better form. Casting evocation spells directly is thought gauche by many wizards, the arcane equivalent of doing manual labor.
Illusion: Most wizards make a fairly thorough study of illusion, due to its tremendous utility in creating items and public infrastructure. Illusion specialists, however, are rarer; much like the school of enchantment, illusion is seen as magic that any self-respecting artificer could easily counter.
Necromancy: The necromancers of the Spires are a somewhat separate subcommunity. Many are interested in medical magic, body modification, and bioengineering. Because they are artificers, of a sort, necromancers earn the grudging respect of the magical establishment, even if they’d prefer to keep a crowbar separation between their respective groups.
Transmutation: A great deal of magical construction depends on the school of transmutation, as does the upkeep and repair of constructs. For that reason, it’s considered essential. However, spells that directly change the wizard into some sort of creature are, like many evocation spells, considered lowbrow and classless.