I cannot seem to get coin 11. If you draw a line north from "Ley-line Hub" and one west from "Cragrock Palace" POIs, and you're above ground, you should be looking at a rubble pile with one blue crystal.
I see the crystal, I can go around the corner to the right to see the crystal you're supposed to use to jump up to it (I don't have to with a skyscale), but there is no coin here. :(