Noice. 70-80 is about average in my experience, although I have had the odd crypt in excess of 180. That Dverger circlet, sold by Haldor is essential for Sunken Crypts. I am OCB when it comes to getting every last scrap. I take reagents in to make a campfire & a sitting log. You can place a sitting log at the base of the dead end craggy rock alcoves with a muddy scrap pile, to stand on in order to reach those bits that are stuck up high in the rock. I also take 2 pickaxes in with me. I hate having to go back because my pickaxe broke.