Not bad, but what Corax said. There are several routes available up the mountain, and maybe you could tell us about one of them.
Unless things have changed, you can still get there by riding the frieght train to the north (Socampa station?), but you must arrange this ahead of time. Renting a 4wd is still much faster if you have the cash.
Great deal of info on a remote and rarely visited mountain.
PS: si tu passes par la Moselle, passe stp mon bonjour aux autochtones.