Really don’t bother to ride up. Why not take the lifts up and do your XC riding at a higher level, there is plenty of opportunity for more climbing, the lifts don’t unnecessarily go to “the top” anyway.
Two suggestions – definitely take in lunch restaurant at Mont Caly (you can ride up various ways if you want or take lift to Mont Chery and ride around) before either descending to Les Gets via red route or a bit of a detour down into Morzine. Great food, spectacular views.
Search on here for details of Les Gets – Samoens, top of Les Gets lifts ride to Col du Joux Plane and Bourgoise then descent to Samoens, if you wish to a ride up the road climb back is used on the TdF (edit: we got a taxi)
There are various XC rides in Les Gets and in the PdS in general which take in a mix of lifts and riding up climbs