Smaller weight increases when going back to low reps

After training with high reps, when going back to low reps, weights are often too heavy. I'd like smaller increases when going back to low reps. I suggest lowering reps slowly to weights don't jump as much. For example:

12 reps

9 reps

5 reps

Instead of going from 12 to 5 reps (much heavier weights).