Let me propose a different approach that gives you complete control over the exposure and makes max use of the camera’s automation (which is always faster than you can adjust in changing light conditions) - manual shutter and aperture with auto ISO AND EC (assuming your camera supports the combination).

First a couple of suppositions. SS is critical - in general, a blurry subject (even with AI PP) is useless. Aperture is critical - insufficient DOF (again, even with AI PP) is useless, and too much DOF ruins subject isolation. With modern cameras, ISO is NOT critical. Most newer FF bodies are quite usable at ISO 12,800 and crop at 6,400, and modern AI PP can often remove the noise. So let the camera do what it does better than you in a fast moving, light changing situation - adjust the ISO, which is NOT critical. Now for EC. What EC does is change the metering sensitivity.

So you pick a shutter speed that freezes the subject (if that’s your intention). Pick an aperture that provides the required DOF, let the camera pick the ISO, and if the image is too dark or light, just adjust the EC. If you’re composing landscapes or still subjects, then you may choose to spot meter, set everything manually and shoot as many frames as necessary to get the required result. But IF light is changing, the subject is moving or the scene is evolving rapidly, auto ISO + EC is a great combination.

Steve Perry, a well known wildlife photographer, made exactly this case for auto ISO + EC a few years ago on UHH after Canon first intriduced auto ISO + EC on their 5D4, and his results back up his opinion.