I always have a few (7) pens inked up and ready to go. There is no official rotation, just pens I happen to have filled with ink for one reason or another. These are those pen and ink pairings.
Blue TWSBI ECO-T (IF) filled with Birmingham Albert Einstein Relative Cadmium for 3 years.
Iris TWSBI Vac 700R (Extra Fine) filled with Private Reserve Plum for 2 years. Refilled 2 times about 9 months ago .
Anthracite Pelikan M805 (0.5mm CI) filled with Diamine Earl Grey for about 9 months. Refilled once one month ago .
Blue Pelikan M805 (0.5mm CI) filled with Waterman Inspired Blue for about 9 months.
Dixie #10 Methuselah's Pine Cone Noodler's Konrad Ebonite (IB) filled with Noodler's Kiowa Pecan for 8 months.
Iris TWSBI Diamond 580 (Extra Fine) filled with Noodler's Purple Mountain Majesty for 5 months.
Night Blue Mica Pilot Namiki Stella 90S (Fine) filled with Noodler's Ottoman Azure for 2 months.
7 inked up pens