Definitely have to go with Nightwing b/c i think he edges the Devil out in the skill department being that he was already natural acrobat since his early youth and with the new 52 origins was in line to be a Talon(ie a wolverine flunkie)
Daredevil. Plain and simple. Daredevil, is boxer as well as ninja. More importantly, he's a well verse dirty street fighter when it comes down to it. As for Nightwing, trained by the best, Batman...but not a well verse dirty street fighter as DD. Then we have the radar thing. Forget it. It's like having Nightwing going against himself who has eyes in the back of his head.
Nightwing telling that a guy is bluffing in a poker game doesn't mean he can tell daredevil is blind. Even experienced poker players nowadays can tell when someone is bluffing. He has a slim chance of telling that daredevil is blind because matt isn't your typical blind person, his radar sense makes him look like he can see. Not even people like mr fantastic etc. could tell that daredevil was blind when they first met