I have just realised my diagram also works if you look at her being found between the Pic and the Porte vertically (not horizontally) so maybe what they meant was this
(Red cross is the skull (2200m, on the path), yellow line is 400m below pic (2050m), green circle is approx "100m from skull", and white lines indicate the Pic and the Porte)
So she was found between the Pic and the Porte, 400m below the Pic, 100m from the skull, puts her at near where the green circle and yellow line (don't quite) intersectView attachment 308545
Apologies for quoting myself but I went back and checked the original quote (which was in French) and it does say "below" the Pic and "above" the porte, but is quoting a "family member" and I haven't seen any other mention of this in other sources, so I'm wondering if it was a language issue and was between, anyhow only time will tell when more is released