Regarding the j.236A oki:
I've found that off of a couple of combos (5BB > 5CC > 236C > 214B > 22B > (5D >) 5C > 2CC > 7j.236A, and Throw > 236C > 214B > 22B > 5C > 2CC > 7j.236A), taking a single step forward after the 22B will allow the 5C > 2CC to connect on Litchi, Carl and, with a slight delay on the 7j.236A, Hakumen and Bang, and also seems needed to work on Makoto. This of course does require omitting the 5D often used in these combos, though.
As for Platinum and Taokaka, doing 2B after the 22B will allow the oki to work. However, the throw combo doesn't work on them; blue beats before the 2C. And again, probably requires omitting 5D from the combo.
Nothing seems to work on Tager, though.