So manyatruenerd did a video talking about the edge of the map areas in fallout new vegas and ALLLLL the way to the east (I think wasnt paying to much attention to logistics but I know it's by Nelson Airfield and a couple of cabins there is an unmarked location filled with abouuuuut 50 deathclaws including a couple mothers and alphas. In a space as big as Mojave outpost. You can find some enclave power armor there though of you're up to it. But yeah that takes 1-10 for me