Finding it a lot faster and more fun to farm these with a partner; had a frost mage buddy who I worked with to kite the pterowings to death, and I have a prot/ret paladin friend who we can aoe down 3-4 young devilsaurs at a time. The 3 of us combined at one point to farm the adult devilsaurs, too, when we got bored. Just required me to flip from ele to resto.