What treatment plan will be the most effective for those 2 atrophic scars? (Photo)

Hello, I have 2 atrophic scars, one from a wart removal (on top) that I treated badly - I scraped off the scab repeatedly and the other from a burn (on the tip of my nose). I had one CO2 laser treatment, which slightly improved the condition of the one on the tip of my nose. Should I stick with that or try something else, i.e. co2 + dermapen or try subcision (if it's safe on such a thin area of skin) + co2? Could you give any advice?