One strategy that has been somewhat effective for me is to constantly jump dash cancel ->barrier guard until nu starts throwing out 6D or j.2D. At this point I use 2c which can set up RC->6c loop. Also when you score a counter hit with 2c at the very tail end at the move's animation (which is usually the range it hits at when fighting nu) you can 5B->j5A->jC...etc into curse loop without using any meter. Also most Nus Will almost always use back dash to escape after being knocked down or when you get too close for comfort. I usually try to punish this by once again using 2C, or j3D and she usually backs right into my tentacle. Sometimes I get punished for it, but hey, you're not going to win this matchup without taking a few risks.
