How can I remove these blotches on the skin?

I’m aware of curves and hue / saturation to make skin tones match but for some reason I have a hard time to get them right in this case. It seems like the areas are somewhat desaturated so the hue tool has trouble to limit the selection to just these color ranges. Of course I could soften the skin completely but this wouldn’t look good either… Any other recommendations how to deal with this specific case?

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