You can only special cancel 3C during the first three hits, so 3C(3)>BBL(6 hits). I'll post the rest later.
Works on Jin, Ragna (must delay 1st BBL low to the ground to get 6 hits), Bang, Hakumen, Tager, Litchi, Relius, Valkenhayn, Noel*. Good luck landing that shit lol. There are variations but this one's the easiest imo. Here's a more practical version:
I only tested it on Jin tbh lol. Also if you don't have wind but meter go for:
Your combo seems legit but 5B starter plus 4 winds stock used is still considered impractical. Also, the ender will be uselessly hard on most characters. Better go for delayed-1D 5CC (frog) 236C dash 3C(3) BBL. After the second BBL you should go for knockdown like this:
5C(1) 214A dash 3C (frog) 236A dash 3C 214C dash 3C 214B oki
Hopefully there are no notation mistakes...