Centaurus,
The Aircraft itself must be used to fly raw data up to RVSM on a regular basis!
The Sim will never, ever be able to recreate the feel of the aircraft. Sim is for emergency training, not for learning how to bloody fly. That should have been taught years before and upkept during your day to day job.
Any airline not supporting raw data flying is simply a danger in tha air.
Any pilot afraid or unwilling or unable to fly raw data on a regular basis simply has no business on a flightdeck.
Simple solution to the problem.