Classes for NPCs

[Kesnit]

I just started running a game set in Skyrim. Rather than having to always come up with new enemies, I plan to build some NPCs to use as bandits, then level them up as the party levels. (The bandits will be several levels behind the party.)

I know what I am using for the melee NPC, but am still considering the archer and arcane caster.

Arcane: I'm debating between pure Sorcerer, or Sorcerer/Warlock/Eldritch Theurge. Pure Sorc would advance casting better, but Warlock give an always-useable touch attack and some variety.

Archer: the choice is Ranger or Scout. I think Scout would be easier, but Ranger has better BAB, and I can give Favored Enemy of the Elder Scrolls races.

[Tiri]

You might as well go full Sorcerer with the arcane bandit. Sorcerers already have more than enough spells to last an encounter, and a measly few d6s at will isn't going to be noticed one way or the other, especially if the alternative is more powerful sorcerer spells.