I kind of do what you are doing. I have these supplements: Vit K2, B Complex, B-12, D3 (5000IU), and a multivitamin. Every day I take 1 or 2 D3. The rest I take a few times a week. I usually only take 2 different vitamins a day, ie. Vit D and a Multivitamin or Vit D and K2.
Not sure if this is best, but there is so much conflicting data out there. I think if you are eating according to the PB, you don't really need to take any supplements unless testing indicates you do. I really like the D3 since it is so dark where I live in the Winter.