LOL I always laugh at people who says an healthy itachi is way stronger than a sick itachi.
can anyone give me some evidence that a healthy itachi should have more stamina/power than a sick itachi? no one even knew if itachi had mastered all of his MS techniques while healthy. he could've achieved or obtained all of his power/ spiritual weapons in exchange of his health.. so who knows.. but we all knew that itachi is sick since he first visited konoha in part 1...
well anyway a not crippled nagato would be much more mobile than a crippled nagato so that really is making a lot of difference.
nagato would own itachi as said numerous times in like....more than 1000 threads like this.
susanoo just got nerfed by kishi with the recent manga. so thats -1 for itachi dropping his chances of winning by 90% lol.