Hi Dan,
If you'd like to add a little more detail to the climbing aspect of your dio, I can help here.
Give the ropes a thin light brown wash.
Paint a tiny crack in the rock wherever there is a piton inserted.
Wherever the rope is attached to a piton, there should be two carabiner links in between — that's how they did it back in the day.
Add some hanging carabiners and a piton hammer to the waist-belts of some of the figures.
Oval Carabiner (mage for reference only).
Rope color and piton hammer (mage for reference only).

The snow patches look too spotty. Connect some of them together on the tops of the rock. Dirty-up the snow just a tiny bit ... like at the bottom edges, where it's melting off. Gravity tends to collect the dirty stuff there — again a thin wash.
Wherever you place figures on snow, make sure that their boots are standing "in" the snow and not on top of it ... and don't forget some boot prints.
Does that make any sense?
No blood for this particular scene. MHO
Please post bigger images.
Good luck!
—mike