I don’t really have a “night stack” apart from taking melatonin during the night. However, I would think different B vitamins would be likely to have different effects on sleep.
Zinc is I think something that is really easy to over do. It is an important trace element, but I dropped it right back to what is in the solgar multivitamin twice a week.
After 10 years of 22mg zinc picolinate daily, I had to stop, because it appeared to be the primary cause of months-long reactive gastritis. Yes, you can overdo zinc.