In reply to Liam Ingram:
From what I recall (but this was 40 yrs ago!) you just head for the shoulder by whatever seems the easiest way on the day (snow couloir well to left, or in our case easy mixed ground close to the ridge line with the odd move of VDiff or so). Then along the shoulder (narrow crest with the odd small pinnacle to get round) and then up the ever-steepening ridge in a great position.
Your idea probably would be the technically easiest way up the Italian side of Monte Bianco, but still very serious. I also think it'd be rather dissatisfying to sneak onto the upper part of the ridge without having first done the Aig. Blanche (we had done its N face) or even the integrale.