I have a couple pairs of Mojo 90. One mounted alpine and the other backcountry.
The alpine, I have mounted with a Salomon PowerAxe Race Plate w/ 914. The PowerAxe Race Plate allows the skis the have a much rounder flex than if the bindings were just mounted straight to the skis. The plate also, improves the torsional rigidity and improves the edging. The other advantage of the plate is that it has multiple mounting holes to accommodate varying boot sole lengths, by so, I was able to move the bindings back and forth until I found the best position for me.
FYI, don't mistake the PowerAxe Race plates with the typical PowerAxe plates that a majority of the shops have. There is a night and day difference in each ones performance. Very few shops sell the PowerAxe Race or even know what they are. I'm only sold on the plate, by so, required to use the Salomon binding.
If I were to only mount a binding w/o the plate I've had good luck with most of the top contenders with the exception of Marker, but will make one exception for the Marker Duke. Usually a killer deal determines what gets mounted on my skis out of the top contenders.
As for my Mojo's mounted B/C I had a pair of Fritchi's on them but went to the Marker Duke's this season. Over the years I've had a lot of Fritchi's or Naxo's mounted on my skis, but always felt that they made my skis not handle as nice as they had when skied with alpine bindings. Frankly, the Duke's have erased all of the performance problems and compromises I've experienced with the other backcountry bindings in downhill performance.
If your looking to mainly use these in in soft snow conditions, I highly recommend that you don't mount them at the boot mark. This was my experience on the different mounts:
- 1.5cm back they carved really nice and rode well in extreme steep terrain (45+ degrees). But in easier blacks and moderate angle powder I had to burn my quads to keep the tips up.
- 2.5cm back They handled the powder A LOT better in the glades, moderate angles, and easy blacks, and could haul a lot faster. Minor difference in the steeps. But they didn't carve as nicely as they had at 1.5cm back, but still pretty good.
- 3.5cm They really rode well in the moderate aspen groves and nice big fast bowl turns. A lot less enjoyable carving on the groomers.
Hope this helps!