Ok, so I have read the core book a few times and I still feel like I am missing something so could some one explain to me how damage and AC rolls work?
Example: My halfling PC wanted to slide between the legs of the PC infront of him, run up the back of the PC infront of the other PC and attack an earth elemental.
I had the halfling roll for Acrobatics twice, one with a DC of 15 and another with a DC of 20,(1d20+ACR twice) both of which he somehow passed. I then had the player that he ran up the back up roll a relex check with a DC of 15, once again he passed (1d20+REF save). Then I had him roll for AC. This is where I feel I am doing something wrong. I have characters roll 1d20+STR for their AC when using a melee weapon, and 1d20+DEX when using a ranged weapon. So the halfling hits and I have him roll for damage, where I have him roll 1d6+str for his sword or whatever.
Is this right? I feel like I should be using their BAB scores somewhere in all of this? Can someone please show me how I should roll for AC and damage by doing 1d6+whatever+whatever. Thanks in advance.