Honestly, whatever you feel like doing. It'd do just fine as any of those. Even if it lacks the speed for thieving, all you have to do is use a speed drug, put on skins, and you'll be able to start a hell of a chaos on your enemies trade. It'd do just fine as a hunter, as well as a trader. Neither one is better. Do whatever you feel like. I'm here to argument against anyone who says this class is not good for any of those.

Know this class is awesome at any group situation.