King’s Step Hook is a solid move to fish for counter hits. However, with it causing an immediate tailspin, it is a difficult launcher to maximize damage off of. Further, it pushes far enough away that many combo extenders simply won’t work, even with a dash.
J King just released a video on how to actually do so. The combos vary in difficulty, but you can get upwards of 50% — if you are an execution god and can pull off the most difficult of extensions.
Source: J King