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 once about 11 months ago .
Sky Blue TWSBI Eco (Extra Fine) filled with Noodler's Texas Sidewinder for one year.
Slate Blue TWSBI Eco (Extra Fine) filled with Birmingham Andrew Carnegie Steel Blue for 8 months.
Aubergine Lamy Al-Star (Extra Fine) filled with Noodler's Purple Heart for 8 months. Refilled once 2 months ago .
Black Aurora Talentum (Extra Fine) filled with Birmingham Southside Park Fern Moss for about 3 weeks.
TWSBI Micarta (0.5mm CI) filled with Kyo-iro #01 Gion's Cobblestones for 2 weeks.
6 inked up pens