Shift is a good but expensive option.
Otherwise Tyrolia adrenalin, Marker F12, etc They are more heavy for sure than the Shift, but I use them to go up with no problem and to go down they are the same than alpine bindings. They also have the advantaje that you don´t need a skiing boot compatible with pins (even most of the ski boots with the hike-ski option come with the pin compatibility). And the final advantage is that if you can do 1200 meter high diference with those bindings and fat skis your legs will be become iron...😂
It depends of your budget and climbing/skiing ratio. The most you plan to go up, the lightest you need your material to be.
*message edited by elecas op 10 Feb 2020 14:09 (6% bewerkt)