So I want to give my players a custom multiclassing option. I know that many people say that multiclassing in Pathfinder is a trap unless you are going for something pacific.
So what I am working so far is this
If you take this option you may only take one class on top of the one you took at level one. To gain a level you must spend an amount of XP equal to how much it would take to level up as if you only had that class. ie. to get forme level 2 to level 3 it takes 3k XP(if going by Medium XP).
with this option, you will have 3 levels The first being your overall character level and the second and third being your two classes.
I'm still not sure on how I want to do BAB,HP/HD and saves