u/Empty_Turnip_9485

I’ve been building up my routine to use retinal every other night and using azelaic acid in between and my skin has been improving. I only use skin barrier serum in combination with them because I feel like they’re both very potent actives. But I was wondering what other products I can layer with them and in which order? I use vit C and hydrating serums in my morning routine but I also want to use volufiline to fill out my smile lines and hollow eye bags. I also have a very uneven skintone and would like to address that soon. Please leave me your product recommendations and advice!