Barrier Repair Rx

I updated the INCI information for all of my current products and at least 12 of them have niacinamide. Now, not all of these products are used every day, but at least 5 of them are. I wonder if chemical overload is why I can't seem to get over this current reactive phase. My skin specs are combo, mature, rosacea, sensitive/reactive (i.e. lobster!).

My question for the group is when you have to strip down your skincare routine because of a flare up or for barrier repair, what are your go-to safe products? (Without niacinamide, lol)