Well, there's a link to the explanation for the gestalt above, and it explains how prestige classes work in that system. However, I have just posted the list of prestige classes in Keldev above. Now, the duel class prestige classes (like the arcane trickster and the eldritch knight) I would probably ask that you shy away from.
And SG, yes, I'll have you down as my first alternate. Rogue's Gallery will be up shortly.
And SG, yes, I'll have you down as my first alternate. Rogue's Gallery will be up shortly.