Dr_Rictus
First Post
Elder-Basilisk said:My advice: multiclass.
Alternately, see if you can get your DM to approve a core class that lets you execute your character concept without the heavy design reliance on sneak attack. Possibilities include the akashic or unfettered from Arcana Unearthed, the delver from Path of Shadow, or even (slightly modified) the maverick from Deadlands d20. If you hadn't just recently played a psion I'd also suggest a savant as an alternative (particularly nice since it gets you sever the tie on your key ability along with all those roguish skills).
I don't usually go in for variant core classes, but this is a situation which could warrant it. If the DM is really going for all undead, all the time, then the PHB doesn't really give quite the niche for a generalized core skill-user that it might.