Yeah, but assuming X different eagles, with each one a 'dummy' bearer, it would be much more difficult to kill the right one. Or Sauron could still think that

Yeah, but assuming X different eagles, with each one a 'dummy' bearer, it would be much more difficult to kill the right one. Or Sauron could still think that it's Aragorn trying to be a hero and killing him in face-to-face.