that could work Rihad, the problem is, you are skipping the heaviest loads which potentially have the largest hypertrophy stimulus of the whole HST cycle.
I think Bryan's original setup is superior, going into 5s and even encouraging doing negatives at 120% of 1 rm and beyond, as long as you can do so safely.
I am doing extended 5s in my cut, and at this point I miss the higher rep stuff and I throw in a drop set occasionally. Though, it might be wise to finish my cycle with some negatives, just before I SD.
But if for some reason, going heavier than 10rm hurts or something, then YES, doing a 15s, 12s, 8s, Or just 15s & 10s will work with SD and other principles, though probably slower than regular HST, I would guess. It seems longer cycles work better for most trainees.