What you actually need, if you like Scarpa, is the Scarpa 7,000er – but they don’t make one.
[ ] Double layer mountaineering boots. Please DO NOT bring Scarpa Alphas – I know that they are now an old model and there aren’t many around but they simply are not warm enough. The Scarpa 6,000ers are a little bit on the light side and also aren’t warm enough. What you actually need, if you like Scarpa, is the Scarpa 7,000er – but they don’t make one. La Sportiva Spantik, La Sportiva G2 SM, Boreal G1 Lite etc are all fit for purpose. These are not an absolute necessity as they will be used to C2 and, perhaps on a rotation to C3. But they are lightern than 8,000m boots (which are an absolute necessity – see below). As a point of interest there are more Climbing Sherpas using G2 SMs up to Camp 3 on Everest than any other make and model of boot. That, to me, has got to be one of the best votes of confidence in a boot that there is.