Quote Originally Posted by lussmanj View Post
The main problem with Beguiler as a lead-in to USS is that there are almost no weaponlike spells on the Beguiler spell list. Typically an USS will use Rays or Orbs to make ranged attacks and deal spell damage + sneak attack with them. Without those spells, you are just dealing sneak attack (or skirmish in your case) with a weapon, which is gonna be strictly inferior to casting spells in your case.

Cool concept, clash of mechanics.
Wands of Acid Splash will solve that problem.

As for OP: Taking a level of SA-like class might not be necessary, depending on how your DM rules the following situation. You can take Hunter's Eye (ranger spell that grants SA) as your first Advanced Learning spell. This will give you SA for one round per casting in which case you will be able to apply US's SA bonus dice. Though you should first check with your DM if he/she will let you do this.