Batman taught Nightwing everything relevant about fighting to teach, stripping away all the superfluous stuff Bruce had found unnecessary after merging 127 different styles. He also had nightwing training from the time he was like 12. Nightwing is a more natural athlete than Batman, he is younger (Batman is like 40, and a lot of people would say he takes Wolvie) and would beat him if not for Batman's psychological edge. In Nightwing 97 or so, Nightwing took out Copperhead with one gadget, standard equip. I believe Copperhead is stronger and faster than wolvie, who is peak human. The gadget was a binder net too strong for copper head to break. You may say claws, but if Wolvie's arms are pinned, his claws don't help. I say Nightwing drops a Flash grenade (his eyes are shielded, it's been proven many times) which is hard on wolvie's super sense of sight. Next comes pepper spray, sonics, and the nets. Nightwing takes it, no prep.