Hillanddale....
My MV or CLOE (cannot remember which) had to get rescheduled when one of these guys who moved on tubed his ride and he needed XTs. I thought to myself at the time it wasnt surprising. Probably a very solid pilot at one time, but even a good pilot who "rides along" for a while may find some of those skills waning if they havent been used in a while.
FWIW...similar problem for guys on reserve in FDAs. I have had to bump several pilots for trips after getting considated.
I always thought if I showed up with less than about 10 landings on the release when I was flying the -11 I was screwing up and not doing my captain any favors. (Everyone may have different opinions on their own right number...3 or more landings a month was mine...). Now as a new captain on a new jet I have a similar philosophy. I know with more experience fewer landings and longer breaks might be okay, but the 767 is a remarkably pleasant jet to land. I loved the -11, and miss a few things about it, but I think anyone who has flown it knows staying really good at landing it takes some effort.