When I say core classes, I guess that can easily be interpreted in many ways. Yes, classes from the Corerule Book only would be my preference. That said, if you pitch me a character concept that I think will fit amazingly well, I can be convinced to let you play something else.
I will be standing by the "no gunslingers, no summoners" ruling though. There might be very basic gunpowder weapons in the campaign though, but they will be extremely rare, and most people will not be trained to use them. And no, there wont be any old-west style people with the guns.
There's a lot of information for me to provide, so I'll fill everyone in as best I can.
@Blinkin, you can choose to use your "Hunter's Bond" class feature to either provide yourself with an animal companion, or you can use "Hunter's Bond" as sort of an area of effect buff to your allies, allowing them to share your favored enemy bonus (half value) against a single target of the appropriate type. You can only choose one of these though: buff your allies or animal companion.
Also, your favorite enemy can't be "Humanoid: Slavers". You can't really choose "Humanoid: Evil" either.The problem is that a Ranger get's their bonuses over their favored enemy (enemies) because they know their behavior and study them. Its not drawn purely from hating them.
For an example, an Evil Barbarian (human) and an Evil Monk (Human) will both behave differently in how they fight. Just being Evil doesn't necessarily mean they behave the same or share the same weaknesses. However, because they are both human, "Humanoid: Human" as your favored enemy would mean you know the weaknesses of the human body and human mind, and could exploit them as such.
You can choose favored enemy "Outsider: Evil", because evil outsiders like, demons and devils, generally share the same weaknesses: they are arrogant, cruel, paranoid, prideful. And having studied their weaknesses, you would know where the 'weak spots' are on their body and how their "societies" work, making it easier for you to scared them or lie to them.
The point is, not all slavers are the same species, or fight the same way. They don't all think and act the same way, so you couldn't study to be better at killing all slavers. Some will use magic. Some will use brute force. Some will use deception. Some will use blackmail.
@steelsmiter, I have no problem with you playing as a Savage Barbarian. However, because they are described as having "little training in modern arms", I'll rule that your character will not have proficiency in any Martial Weapons that racial feats don't give them. You are still proficient all Simple Weapons though.
@Muse, it will be good to have a cleric. Too often, nobody wants to play the cleric >.< For a pantheon and picking a deity and such, I'll ask that you use this resource ==> http://pathfinder.wikia.com/wiki/Portal:Religion
Just scroll down to the "Find a Deity" section and pick whoever you feel fits your character best. I'll be using canon source material for things like that so everyone knows what they are dealing with. That said, if you prefer, you can create your own deity and religion, as long as you clear the tenants and beliefs of that deity and the religion with me first.
Also, just throwing this out there. steelsmiter, prostitution is NOT illegal in my in game world. Not in most places, anyway. You wont find any sex workers hanging around Magrim's temples, but they will be around.
Anyway, if anyone has any questions about how I plan on running the game and what is allowed, fire away