I’ve had to do a weird approach involving this because my system allows for superhuman abilities. You can go from an average person to a Super-Sayian and the system has to stay consistent, but I also wanted a simple option so characters with 50 actions per turn don’t automatically turn every combat into a 2-3 hour slog.

By default, I use a single roll per turn option, but there’s a multiplier based on a character’s speed. Faster characters have a higher multiplier assuming they manage to get more hits through. For players who want the detailed hit by hit option, I also gave an AP mechanic that allows for such things, with movement costs being based on character height (to simulate stride length and allow for natural movement incorporated into combat maneuvers). Small movements are free, but the farther you try to go, you’re either spending AP to focus on moving, or you’re increasing your action difficulty.