About Rotation, targeting melasma and pigmentation

These products in high rotation, i don't use the same products daily (with the exception of sunscreen). I'm trying to resolve Melasma on centre of forehead and underneath eyes. Hyper pigmentation on tops of cheekbones
I often rotate week to week by retinol one week and barrier support the next for night time, and then in mornings rotate between gentle acids and vita c. I'm starting to see improvements