The only time i really RC is 6a haka chun RC 5b tsubame and so on, I'm never close enough to 2d after 6a. It will teach them to stop blocking low so much.
Theres a better combo than the one you posted there.
Must be near a wall and your stick close.
Haka churn Hatsu Haka Chun 5b jbc dj D falling c 6c tsubame 6c
I just started using this and i love it, 4k i think?