Quote Originally Posted by Zeful View Post
The only problem with that reasoning is that the rules emphatically disagree with it. 3 and 5 level prestige classes have no advancement beyond those levels. Even if the class is poorly written enough to let you take those levels, you wouldn't get anything. +0 Bab, +0 Saves +0 hit points, no special features, nothing, because those levels don't exist in the rules and thus have no benefits. Heck, even gaining the 11th level of a 10 level prestige class requires you to have qualify for the classes Epic advancement so no gaining an 11th level of Horizon Walker at level 16.
But that's not what Legacy Champion or Uncanny Trickster advance You don't get bab, saves, hit points or anything from them. I can't see your point.