I think the normal route from biv.Gervasutti could be rated F/PD only in the past when the Frebouze glacier was bigger.
Now the acces to the rocky cliff below the summit, is difficult; along steep ice slope (45°) in the begin and than on not easy slick rocks, covered of sand.
This is why our ascent stopped there...more or less 150m below the summit.
"After the first glass, you see things as you wish they were. After the second, you see things as they are not. Finally, you see things as they really are, which is the most horrible thing in the world."
--Oscar Wilde on Absinthe