PF, E8, Gestalt

[The Random NPC]

I have a GM that is thinking about making an E8 game set in the modern day, using the Pathfinder system. At first I was going to throw together some kind of spell caster, but then he told me that if I want to play a prestige class, he would allow me to gestalt it with 1 level of a base class. My question to you is, which combination of classes is the most broken. The rules are, you can use any book published by Paizo, no psionics, you can get 2 traits, and 2 drawbacks, and you can trade 2 traits and/or 2 drawbacks for a bonus feat. My guess is the most broken builds will be some kind of Theurge build, as that will give you full casting from 2 classes.