Eighty percent serviceability is optimistic at best. Yes, one could reasonably expect that during a deployment, but it will drop dramatically in garrison for a variety of reasons. Major inspections on Griffons take a couple of months. If a deployed aircraft requires a major inspection, it goes home in the C17 that brought its replacement in.
We had eight Griffons in KAF, to provide up to three sections of two. Four back in Canada were prepped to go at short notice, partially to cover aircraft due for inspection and partially as replacements in the event of loss, and they did not fly.
So, if, out of ten machines total, one or two are sidelined for major inspections, six are deployed to provide two sections of two, at least one is set aside as a hasty replacement, how many are left for training aircrew and techs (conversion to type) and currency for those qualified (given that over two-thirds of qualified pers will not be deployed in order to provide continuous rotation)?
This is silly.