Since this thread popped up again, I wanted to know if anyone has ever considered using Assasin spellcasting levels to qualify for the preregs on the AC, and then adding the caster levels to a single level of Wiz? You end up being only half a level behind on your sneak attack, and at 20th level you cast as a fifth level assasin and an 11th level Wiz.
At 20th level you...
Have a BAB of +11
Have 118 skill points (plus 23 times int bonus)
Have 6th level Wizard Spells
Have 3rd level Assassin Spells
Have 10 dice of sneak attack.
At 20th level, ou are pretty decent, although I think I'd rather have 4 points of BAB, 66 skill points, and some Rogue abilities. Still, it's workable.
The problem is the long crawl on your tongue. For the vast majority of that, you are going to be sucking - because you get the low-end spells first.
At 10th level you are looking at not having Skill Mastery and being out 1 BAB and 26 skill points - and having basically nothing to show for it (well, 1st level Wizard spells and 3rd level Assassin spells - which is basically nothing).
Good for an Epic character, however, in the long run you are going to be just like a Wizard but have a better BAB and Sneak Atack and more skills.
-Username17