So personally for me here's what I do against male characters:
After restand (+5):
D4 F344
D1 S244 (if they have a 6 frame poke, because online really screws frame data sometimes)
After amp fireball(+7? but I've heard people say +3) and after strings ending with U3 (+6):
F344 (because of...
Are there any strings where doing ZHat and then canceling it (DD) makes you plus? I've tried F1, F2, F21, F13, and they all still seem counter-able. Is this just a forbidden cancel?