UKH

How technically hard (UK grade) is the Rébuffat-Baquet route in Aiguille du Midi S face?

The crux pitch (2nd) is 5b max I'd say. I remember it all being in balance - it has lots of footholds. Great route!

HVS/E1

The S crack is E1 5b. The traverse before the S crack is perhaps E1 5a as it’s a bit bold from memory. Think you can do the traverse and the S crack in a single pitch with two ropes. 

I think traversing to the base of the S crack is a recent habit, the original route started almost directly below the S Crack.  I was told and would probably agree that traversing in creates a more homogeneous route.

Al