Prestige Class with Advanced Casting

[Addem Up]

So, my current build involves a heavy multiclass between Spirit Guide Oracle and Veiled Illusionist. After 7th level of Oracle, though, there's not much I gain from Oracle until 15th (which I won't get because I'm putting 10 levels in VI).

Does someone have a list of all the prestige classes that advance spellcasting and are available to divine casters?

[Vanykrye]

No, but you can always look at D20PFSRD and similar websites to get ideas. Umbral Agent might be something you want to consider, but it might be a little darker than your intent for the character.

[The Mortonator]

link