What would theoretically be the best base for a self-taught charisma caster?

[Malik Gyan Daumantas]

And I'm talking about one that could potentially transition into either a bard, summoner or an oracle respectively. Currently, I'm having my eyes on the mongrel mage as the messy nature of it really reflects the unfocused nature of how a self-taught charisma caster could potentially be.

Bard is a bit too music orientated for what I'm looking for tho.

[Name Violation]

adept, the npc class. just swap it to cha based

adept

[OmniMage]

I also suggest the adept. Though I would use a different spell list cause that spell list is cleric lite. At least, I assume you're going the sorcerer route. If you going Oracle, then cleric lite will do just fine.

[OmniMage]

Now that I'm thinking about it, is there really no NPC class for arcane spell casters?

[Malik Gyan Daumantas]

OmniMage wrote:

Now that I'm thinking about it, is there really no NPC class for arcane spell casters?

None that i could find.

[SheepishEidolon]

According to Archives of Nethys only the five NPC classes mentioned in the CRB exist, hence no arcane caster among them.

Advanced Race Guide has starting ages depending on class: Oracles and sorcerers are supposed to be "intuitive" (quite young for their capabilities), while bards and summoners are "self-taught" (which takes somewhat longer).

Note that witches (self-taught) and druids (trained, requires the most time) can be Cha based casters, too, with the right archetype.