Hard to tell what you are doing from the description.
Are you doing a slide combo?
If so you can do slide > tnt~finish <DC> LK heel > anything you want including tiger knee.
If you are using the slide, you'll want to stick in the heel otherwise you will not juggle.
The timing to DC into heel off of finish is fairly severe (is why I like the slide to practice).
You'll know if you don't have it right bc if you use too many punches before the finish, the DC heel whiffs.
So for example that's

TNT(1-2punches)

(DC)

~etc.
An aside: Found a PRIZE today.
(near corner)
j.D> s.C> f.B>

+

(HD Bypass slash kick) xx TNT~finish xx LK heel > (knee xx heel heaven till meter runs out or you have to jack again)
If not near corner can use heel instead of TNT to carry I think, but still exploring that.