With the Alps, wherever you are, you’re only about 10mins jet flying time from MORAs < 10,000’, 15mins worst case. Drift down is not really an issue, depressurisation needs a plan but it’s pretty obvious from the charts what to do. The UL55 route has ~100nm above 10k, so you’re not going to run out of oxygen (especially with no pax) before you can fully descend, especially if you put a critical point 50nm in...