Shin: I think I’ll have to search for some non-youtube videos to d/l and burn for you since you can’t watch videos.
Anyway, yeah he can dj. with other attacks aside from slash but they won’t combo (you know this now, right?). If they’re ducking, you’d be lucky if you can even double jump after the late jump in attack. If they’re jumping and you catch then with j.slash, then you can combo into a dj.slash, uppercut/whatever. You cannot combo into say j.slash into double jump punch (that just doesn’t work).
I’m not sure what you’re trying to do. If you’re trying to create mixup tactics I’ve no clue how you’d use these. Best mixups are the ones you whiff jumping hardslash after you’ve knocked down a character. E.g. Knockdown, jump straight up and immediately whiff jumping hardslash, as your hardslash recovers, air dash slash - hardslash (they’ll get hit if they were ducking). Mix it up with j. hardslash (whiff), land, sweep. (Send me a pm if you have problems.)