Borderlands Enhanced Armory vs Craw

So if able to kill Craw is the Armory method even worth keeping as seems a waste of time when you get double E tech guns which to me shouldn't even spawn in Lancer Chest or red chest in the Armory and Gift Shop in Claptrap DLC with how common they pop up to waste a chest slot but sure can say farm Craw > Ajax (for Ajax Ogre) then the Armory but too much time for wha its worth