Purpose is just to be able to deal with frozen locks, emergency binding adjustments and these kind of things that might happen in a ski day
I'm not touring or doing anything extreme, and after some research my feeling is that it has to be the Leatherman Wave or the Skeletool. Basically because of the removable bit drivers, in which one would be able to put the philips #3 for binding adjusting (it should be compatible with opzidriv #3, right?).
I do carry some generic leatherman imitation today, but its really not quality and I dont trust it. I did use the pliers once to fix a helmet strap, so hey, its useful
Of course it all comes down to 2 points (as they are in similar price range):
1) Is the Wave too heavy?
2) Is the skeletool too light on features? is the grip sturdy enough to torque the bit driver (the way you hold it to use the bit driver is a bit odd, half closed, half opened)
So impressions, past experiences, general speculation in hypothetical highly unlikely situations are welcome