What is the best hunter spec for Dueling? PVP

I know everyone is going to say MM here and I agree. I have been playing MM for a while and overall its pretty good, especially in BG or need to kill a healer in arena.

Is this still the case for dueling? By no means am I a pro player, but I have a lot of issues killing of Bis classes, I have to play nearly perfect (timing deterrance, planning traps a head of time, constant kiting) to have a chance and still lose cause some classes will kill me in one rotation.

So would BM or Survival be better in this case? Against Smournes classes or high bust casters?

Thank you all.

There is no best, only the most appropriate

'Free' duel as in world pvp MM hunter is probably unbeatable, because you can just run away, unless you get ambushed by a priest or something. In a regular duel where you're forced to play around the range limitations, of course there will be a big chunk of classes/specs you can't beat. That's just how it is.