Hyper focused spellcasters?

[danelsan]

Hey there. I'd like to get some opinions regarding a big change I'm considering for a setting I'm making.

The idea is that there won't be spellcasters with broad access to a huge variety of spells. Instead, their choices will be quite limited. For instance, there would be no generic wizards, only necromancers, diviners, illusionists and so on - and they would only get access to that one school of magic.

There would be ways, probably setting-specific prestige classes, to add extra schools, but it would always end up with fewer caster levels than a single-school specialist.

I'd like to hear about potential pitfalls for this idea, schools or domains that would need more spells, thoughts on balance considerations and any other suggestions.

[noob]

You need the removal of all the summon monster spells and of planar binding and a lot of other spells of the invocation school(as well as using PF polymorph rather than 3.5 polymorph and also to remove spells like simulacrum or domination(because else once the team will have met one wizard of each school they will have copies of them or those wizard themselves and thus will be able to have access to all the schools)) then there is the problem that 100% of the optimized team will be team wizard with as many wizards with different schools as they can for being as a whole a T1 character.