Use j.b, j.c has too long untech time, while j.b is techable the second they hit the ground.
I saw them adjusting their opponents to the D bug, I'm taking all sorts of mad notes with these videos.
The first thing I want to practice once I get my paws on CS is the 100% meter combo off of an air grab, I've seen some players do it off of a full jump (not very close to the ground), instead of landing and doing a TK j.d, they do the j.d on the way down after successfully doing the throw, then follow up with the 5d and you know the rest.
I would also like for someone to confirm if the same setup can be done with a FC 5c (instead of an air throw).