Pretty much what Sajam said. j2 in Staff. Also d2 in Escrima is really good now. Like, really good. I don't see people mention this move enough.
And Afaik she can't cross up NW with that? Idk I'm pretty sure I read something like that on the Catwoman forums.
I played a MMH at Summer Jam and blew him up free, but I don't think the matchup is worse than 6-4 or 5-5 just based on principle, I just outplayed him (Many thanks to @Sajam's writeup (>^.^)> you da bes). If you're baiting and bullying a NW that bad, it's because you're just that much better than him. MMH doesn't outzone Nightwing when he's in staff either. MMH can't do jack shit about staff pound from fullscreen because Nightwing is at +frames and teleport doesn't give him projectile invul. You have to go in. And then when you're in, you get to deal with pressure. Also, unless you're telling me that you can read every b2 I'm going to do and beat it with 2, then one being 15f and the other being 12f is kind of irrelevant outside of start of round. Also what happens when you lose trait? There goes all your great normals and footsies. Nightwing doesn't have to rely on a timer to be able to play footsies with you. That alone should tell you something about the matchup.
P.S. No NW should just be doing raw Flying Grayson unless it's for a purpose like AA'ing or punishing. -.-