to make it fast, remember to use your frames sparingly. If it’s fast enough, it’s okay to just yeet any frames inbetween release and contact. Mess around with deleting inbetween frames and seeing how it flows. Another key part of combos is thinking it out first, and knowing how to place hits so another one can follow. Sometimes a right jab > left jab > right jab can even work if you give the punches weight.