When making an arcane trickster which makes for a better base. Wizard or Sorcerer? Follow up question, one level dip into vivi or rogue?
Wizard, by far.
1: Only needs three levels, not four, to qualify
2: Intelligence gives skill points, very useful to an arcane trickster. Charisma gives one skill (and with trait mod installed, that can be moved to intelligence).
Vivisectionist or Rogue is more open.
Rogue gives more skills, more weapon options you don't need (though I
think there might be a short sword or rapier somewhere in the game that gives a passive bonus to something, but honestly don't remember), and either Trapfinding (meh here, great in PnP) or a good intimidate boost from Thug (great if using trait to make persausion intelligence based, meh otherwise). Alchemist gives 1st level alchemist potions (meh, with their stunted casting level all you'll use these slots for CLW out of combat), mutagen (useless for you), and Brew Potion (if you have the crafting mod).