Trojan, I'd have thought it made eminent common sense to keep all ex-regular aircrew semi-current with a short annual or even bi-annual reserve commitment. There would be added advantages to the Army in implementing something like this.
There'd be some who'd happily do far more time than the minimum required and there's be others who, with a foot still in each camp, would come back to full time service after they found that civvy street wasn't all they were expecting it to be. A steady stream of such returnees - (I can almost guarantee there'd be a steady stream) - would have a salutary effect on those considering getting out, so it would be a win win win situation of the Army.
Relatively simple, second tier helicopters like the Kiowa or the SuperHuey would be ideal to equip such units. In a similar fashion to the way the RAAF employs the Hawk as a lead-in fighter for graduates of 2FTS before they move on to the F18, it would also allow first tour Army pilots to learn their trade and gain invaluable experience in the more simple aircraft before moving on to the MRH-90 and the Tiger. it would also mean far more land units would receive helo support than can from the very limited number of MRH-90s and Tigers in our inventory - that's if and when they ever become operational and remain serviceable in numbers to fly!
Of course, it'll never happen, because it makes far too much sense.