Board Thread:Naruto Discussions/@comment-30201637-20161011193334/@comment-734582-20161013104816

TheOneWhoLovesNaruto wrote: I hate to bring this up again, but with the Yata Mirror and the Sword of Totsuka, Itachi's is the strongest. I do not believe for even one second that Itachi's susanoo would stand a chance against Sasuke's Tailed Beast Susanoo. Every jutsu has it's weakness, as Itachi said.

Hagoromo's only appeared in the anime so it's more difficult to decide. Everything we know suggests Hagoromo had a Susanoo and it was a Perfect Susanoo. We don't know his eye powers but we can safely assume that Hagoromo could recreate Sasuke's Susanoo. However Hagoromo was the actual Jinchuriki of the Juubi and had dual Rinnegan so it's likely that Hagoromo's Susanoo would be the strongest of all.