Hey I am doing this on a whim but I think I have an Idea:
So I was thinking that Rangers could track people based on the scents they leave behind. So I thought that the Rangering skill should be able to track animals and animal scents, kind of like a hunter. Os if an animal is in a spot I guess that the animal MIGHT leave behind a scent. If a Ranger got this scent then He/She could track the animal(I guess by an arrow appearing on the map in the direction of the animal) These scents would last about an hour (real time) before fading and an animal would have a CHANCE to drop them every 30 minutes. Also Rangers should be able to track people who are in the wilderness by Examining(sniffing) a stump or tree or boulder that the person interacted with. For example, if a man interacted with a tree(He chopped it so the stump would have a scent. Or he collected something from the tree would leave a scent) So that rangers who get the scents of people who interacted with wilderness will be able to track them in the same way as animals.
-Chidori
Place Flames here V