An arrival at La Plagne can be good if they do the first part of the 2018 La Rosière stage with the climbs of Bisanne and Col du Pré. You can also link it with the Col du Tra which they have done in the opposite direction to Longefoy in 2023 on the Courchevel stage. But I generally agree that gradients below 8-9% don't make enough difference anymore with how fast these guys climb, which is why you can see performances like that of Mikkel Bjerg on Hourquet d'Ancizan or more recently Nils Politt on Cime de la Bonette. Nowadays I would rather see a sequence of steeper but shorter climbs like to Le Lioran than these tempo climbs. Or at most just one to set up a first GC hierarchy or after a steeper climb to initiate long range attacks.