This match is extremely tough versus a Nu who knows what the hell they're doing. Sledging like an idiot will get you killed. If the Nu just wants to sit there and wait for you to make the first move, good luck getting in on Nu. Nu controls this match completely. Only thing you can hope to do is capitalize on a mistake. Best thing to gain ground is to jump or super jump and immediately barrier to gain ground until you are within sledge range. Do not sledge your way through unless you're completely sure you can hit her (even if she blocks it) with the end of the animation or if you feel Nu is already committed to her :dbt: crap and you can get two sledges off.
If you got one of those idiots cornered and try to air dash over you and start the whole process again, I try to predict it and jump and air grab or knock Nu out of the air with some aerial pokes if possible. Also, if you see Nu throw out her horizontal distortion drive, barrier that bitch and if she rushes at you while you're in block stun, block low and watch for an overhead and expect a throw. I rarely barrier burst this match, because you're screwed without a barrier. No more jumping and blocking the spam anymore.
It's just a really retarded match-up and needs some tuning from Arksys. It's not very fun and feels dumbed down.