DM gone crazy?

[starwed]

Well, the epic prestige class perfect wight seems kind of what you want.

If the DM will allow you (and he probably would given the existing power level of the game ^_^), it's probably worth it to restat your character with levels of arcane trickster. (Just replace 10 sorc levels with arcane trickster, for a lot of extra sneak for no cost other than multiclassing as a caster in the first place. And that's actually kind of a steep price.)

 

[Sejs]

10 levels of Shadowdancer, and 5 levels of Arcane Trickster.

If your DM will let your character have retrained some, cash in 5 of your Sorcerer levels and replace them with the other 5 levels of Arcane Trickster. You could also look at Archmage levels, but that comes with a rather heavy feat cost for a Sorc/Rog.

Rogue (3) / Sorcerer (13) / Arcane Trickster (10) / Shadowdancer (10). Alternatly, you could check out the Void Incarnate. With a little cooking, something along the lines of Rogue (3) / Sorcerer (6) / Arcane Trickster (17) / Shadowdancer (1) / Void Incarnate (9) looks rather tasty.

 

[Sledge]

whatever you take it had better grant epic feats. And forget shadowdancer, vastly overhyped at epic levels.

 

[QuaziquestGM]

Warlock. All the way.

 

[Shazman]

I would take 8 levels of assassain and 7 levels of arcane trickster. If you don't qualify for either, take a few more rogue levels till you do. This combo gives you lots of sneak attack dice and improves your spellcasting. You also get hide in plain sight, uncanny dodge, death attack, poison use, and some nifty assassain spells.