Nu isn't actually a bad match up for Tao. People say, "ZOMG SHE HAS FULL RANGE AND MASHES D ALL DAY! OH NOEZ ITZ HAXORS BAN PLZ!" Put it this way, Nu can launch swords. Tao can launch herself. Get the picture?
Whether you triple jump; whether you drive; whether you crawl; your goal is to get close and make Nu feel uncomfortable. Sure she can poke you out of the air with her swords, but barrier guard solves that problem. If you instant block them, then you're free to move about the country. j.4d will also travel over her 5d projectile. Drive cancel b isn't a bad idea either. But if Nu reads you, then you'll take the hit. All in all, there's plenty of ways to close the gap against the silly sadistic robot.
While she's close, you just need to look out for her overhead cresent saber and 2c (the swords that block low only). If you IB them instead of barrier guarding, you won't be pushed back - so Nu will just take that opportunity to either back dash or try to force a mix up. If you guess right, then you can punish them.