How do you add to a sleep stack?

Hi, I'm planning to start a sleep stack by adding one of these supplements every 3-4 weeks:

- Melatonin (microdose when needed)

- Magnesium Glycinate

- Magnesium L-Theronate

- L-Theanine

I think this is a pretty classic stack, but I'm wondering how to go about adding more to it/switching things out if I were to experiment with optimization. What is your process for going about it? I'm a bit afraid of overdoing things.

These are the supplements I'd want to try out:

- Apigenin

- Tryptophan

- 5-HTP

- Vallerian root

- Lemon balm

- Passion flower

- Skullcap

My endgame is to keep the stack simple but optimized, so perhaps 3-5 supplements at most. Should I just replace the experiment supplements one after another after a few weeks to see what works best?