Lowering the BAB requirement adds 2 points. Adding hide to the class skill list changes nothing, and increasing the hit dices adds 5, for a total of 7 points.
The difficulty I see with this class is there are so many requirements, I can't figure out the progression to get into it. You would need 4 to 6 levels of fighter to get the feat progression (more if not human), which would also get you the BAB, and one or two levels of rogue to get the skills, since the Fighter gets terrible class skill points and most of those skills are cross class.
What I don't see here, in either the color text or the class abilities, is what these requirements are used for. Why does the class require an expert at Diplomacy and Intimidation? Why does the class fighting style require Two Weapon Fighting (since they can use only one weapon), Power Strike, and Great Cleave?
My point here is to review all the requirements. The need to have a beloved, then both travel to the plane of shadow to take part in a set of trials that may kill you is a fairly significant limitation all on its own. This reflects my personal bias, I would like to see more PrC's written with roleplaying requirements like this class, rather than the game mechanic requirements.