I don't know Sub's inputs I just push buttons
If I was to guess
B2 - f42 ex iceball - run cancel - njp - air to air punch - f42 slide
B2 - f42 ex iceball - run cancel (wait until you're on the other side) - njp - air to air punch - f42 slide
I was messing with that clone combo off b2 in the corner and I get it to come out more consistent with b2 b2 1 (short pause) 1, b12~clone. I never actually tried it with d3 1 b12, but doing the 1 pause 1 moves you far enough away so that the clone will come out really consistently. Same damage. DUECES.