Thanks for the link.

I don't think he does use it, he only uses core + completes (despite we having some Ravenloft rules on our game, kind of psychological terror, he's a psychologist). He complains about unbalance on newer books.

What is the difference in grabbing sorc or wiz? I'm inclined towards sorcerer, since having more spells seem to fit best the utility I want to fulfill.
Is Rogue 1/Sorc 4/Unseen Seer x a good path to follow?

And sorry for insisting, can you guys suggest some details on how to get started into it?