tried out the fuzzy set up a lil more and got it working
turns out you can do j.S MAD deep and still get a double jump to come out.. like Kliff practically appears to be standing when the jS connects, then do double jump K-S-H with the SLIGHTEST of pauses between.
from what I've tested it should hit everyone besides
Kliff
Buri
Faust
Zappa
also due to the incredible shittiness of jK's horizontal range - FDing the initial jS will make the rising jK wiff in most, if not all situations.
edit: what button do you guys use for anti air. 6P is so shitty and he doesn't seem to have much alternative 5P maybe?