I notice that the OP uses the word rotation like it's a normal or proper thing. It is not. I don't always carry the same gun, but I recognize that that is partly a bad thing, and I shouldn't do it without a good-enough excuse. In my case, it is usually about clothing.

If toting a gun were more important to my health than I think it is, I would probably be stricter. As it is, there is now pretty much one [main] gun I carry when I'm serious, at which time I will also generally carry my regular backup.

As toys, or for practice, I use a lot of guns. I believe that it is best to have a familiar sight picture and trigger pull when carrying for real.

I don't think that we should use words like rotation, leading people who haven't yet learned better to think that that is some kind of normal practice.