So an update, but my rotation has not changed much.
I smoke a bowl each day after dinner, but only use two pipes a week. At the end of the week the two pipes get cleaned and then rest for about six weeks. So when I buy a new pipe I usually keep in mind that I will need to pair it with something, either one I have or another I intend to get.
Here is my current rotation.
from left to right: Fribourg and Treyer stack/Luciano stack/Sebastien Beo pot/Stanwell 199
from left to right: Tsuge Mizki/Castello/Ryan Alden/Dunhill shell
from top to bottom:Briar Bird anse/Refbjerg brandy/Benson and Hedges/Orlik
From left to right: Sebastien Beo/Benton/pair of Stanwell 240's