If your primary concern about the volume is that it is causing your illness it doesn’t really matter which plan you pick - instead if matters how well you listen to your body.
Pick low volume and add workouts, pick mid-volume and follow the plan. Either could be a recipe for success or failure. If you start to break down and don’t listen to your body and take a break or reduce volume you’ll end up in a dark place. If you don’t start to break down you can maintain or increase volume as you see fit.
It’s much more about being willing to adjust based on your body’s response to the stimulus than about picking the ‘right’ plan ahead of time. Either of the plans you’ve outlined would work for you