This would be to easy....the 3rd decimates itachi a million to one for christ sakes...itachis has absolutely nothing in his arsenal capable of beating the 3rd,with tsukiyomi itachis has problems LOTS, because 1st of all he won't even be able to keep up with the 3rd in order to use it the 3rds speed and reflexs are millenniums better than itachis not to mention his ,strength, reflexes, durability, chakra levels shit on itachis in 10000 different ways, amateratsu is no threat at all dodge everytime.... susanno is no threat at all because his body is the strongest shield no matter how much itachi tries to stab him with torsuka he will never and i repeat NEVER be successful in piercing the 3rds body, and his 1 figured hell-bringer technique is the strongest spear so if itachi is stupid enough to try and put his susano into a physical altercation with the 3rd that shit WILL lead to his downfall, the raikages are another one of itachis worst opponents, itachi can't win this fight with all the intelligence in the world.. hes doomed...