Your best bet for these depressions aresubcision. I would not use filler as it's too superficial. You would vacuum after using a Chinese cupping set (amazon) or one of those micodermabrasion battery operated things. Once they do a few subcisions I would do a acid peel such as TCA to smooth out texture. on the scarred areas only. I am afraid of hyperpigmentaiton so I would use hydroquinone aka skin bleach before you have your peel and after you heal completely, maybe also some vitamin c serum.