I shave about 6 days a week. I have enough razors in rotation that I only use a specific razor about once a month. I was grouping razors by blade width, but recently decided to group more by vendor/type. So now I might be shaving with a 7/8" TI one day and a 6/8" TI the next followed by a 7/8" Aust and a 6/8" Aust., then Wacker, BRW, Jerry Stark, etc. I only have a few 5/8" thrown into the mix. I keep my razors in slotted plastic boxes with 6-7 razors per box. I use all the razors in one box and then move to the next.
The only time I use a razor more than one day in a row is if I get less than a stellar shave. Then I take the razor to the stones for a refresh and shave with it again the next day to make sure my refresh was successful, if not, back to the drawing board...uh...hones and strops.
I also have enough shaving soaps and a few creams to use a different one for each shave during the month. However, for these, I do not have a strict rotation. Each shave, I select the soap/cream that matches the mood I am in that day. Do I want an aromatic fougere, a spicy oriental, a bright chypre, a deep earthy or grassy aroma, or a barbershop scent that day? I have a friend who uses MWF every day. It is a great soap once you learn its nuances, but I like choices of soap bases and scents.
I have a variety of brushes of various types: badger, boar, horse hair, synthetic. I do not have enough for a monthly rotation. I tend to pick the brush based on the soap/cream selected for that day. Some soaps seem to work better with specific brushes. For example, I would tend to use a badger brush that holds a lot of water if I selected a thirsty soap.