What are the appropriate fraxel settings for brown skin person with acne scars removal?

Hi, my doctor did it at 45mj, level 8, with 6 passes. Is this appropriate for acne scars? I I am of North Indian descent. I had a few session years ago and I felt like the skin was more crisp, darker bronzing, and the skin that formed afterwards was more fresh looking. I felt like I got more out of each one of those earlier sessions. Is this doctor's setting a little too passive or did the technician perhaps move a little fast hence I didn't get as much of an effect?