like say AchedSphinx, you need a lot of match up expériences. If you sure you whiff your 6DD or 2DD you can instant dash for more chance to hit and dash cancel with a Jump back dash if its block or you can combo. for noticz that you must have a lot of match with her with a lot of player. i have 1410 match with nu-13 and i gain a lot of experience for the Match up
Me vs a rachel player. I knew when a rachel jump she try to zoning so my reaction is to instant dash 2DD or 6DD for counter.
Exemple: http://youtu.be/KX5hd8ni6I4?t=2m18s at the end of the first round you can see I ID 2DD and counter hit.
Nu has a weak defense so you must be careful when you use this drive because nu doesn't have reverse (in dia) and a low vita.
You must move non stop if you want to zoning because if a player send nu at the corner its really difficult to release.