I always have a few (6) 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.
Kyanite Blue TWSBI Vac 700R (Extra fine) filled with Noodler's Ottoman Azure for one year. Refilled 2 times about 3 months ago .
Aubergine Lamy Al-Star (Extra Fine) filled with Noodler's Purple Heart for 11 months. Refilled 2 times 2 weeks ago .
TWSBI Micarta (0.5mm CI) filled with Kyo-iro #01 Gion's Cobblestones for 4 months. Refilled 2 times one week ago .
Plum TWSBI Eco (Extra Fine) filled with Akkerman #17 Staaten-Generaal Rood for 2 months.
Green Nahvalur Original (Fine) filled with Montblanc Irish Green for about 2 months.
Tibaldi Impero Celluloid Scriptorium Pens Idyll (Fine) filled with Pilot Iroshizuku Kiri-same for 2 weeks.
6 inked up pens