For what it's worth concerning injury avoidance and volume I've done this to regain without injury
Workout 3x week, 2-3 sets per exercise, full body, 45 min/day
Mon
30 reps 50%lbs of Friday's weight
Wed
20 reps 75%lbs of Friday's weight
Fri
8-12 reps to muscular failure with 0-1 RIR
When I can do more than 13 on day 3 I add 5% more weight to that exercise and adjust weight % for next week.
I found it was a great way to progress and still recover decently.