Nothing depends on anything
Each formula is complete on its own. Buy one, keep the routine you already have.
For skin that keeps reacting. Each formula works on its own, so you can add one thing at a time and find out what your skin is responding to.
Threethat stand alone
If your skin keeps reacting and you own eight products, the problem is not effort. It is that eight products changing at once is one test with eight variables and no control, so nothing it tells you can be trusted.
Start with one. Give it several weeks. Add the next only when you are ready to attribute whatever happens next to it. If you already own something that works, keep it — nothing here needs the other two to function.
Product pages show the supplier ingredient list, directions, size, price and relevant cautions, so you can check a formula against whatever you are trying to rule out.

Product facts stay separate from general guidance, so both are easier to evaluate.
Each formula is complete on its own. Buy one, keep the routine you already have.
Ingredient lists are reproduced from the information supplied for each formula.
Directions provide a starting point; amounts and frequency can change with comfort.
Product copy describes cosmetic benefits without guaranteed results or timelines.