Sharpend
For better or worse modern FJ flying doesn’t really need the same level of pure flying skill to stay current.
Since you mention the Jaguar I will use that as a barometer. 15 hours a month was a sensible minimum for the job and kind of flying we did.
The role and type of flying that Typhoon and F35 do makes it harder to insist on 15 hours of live flying per month.
For QFIs on the Hawk, that situation should look after itself.
BV