There's two six path power in akatsuki and Itachi who is an uchiha by bloodline has the Mental energy Yin power of Six paths.
You're discrediting Akatsuki too much, Nagato is strong but by himself he cannot push naruto to high diff because of intel and his life force deficit thanks to the Gedo statue (regardless if he's mobile in the OP.)
My point of view:
1) Naruto cannot get past Yata which is 360° and has the power to reflect all attacks by matching it's traits to that of said attack.
2) Totsuka can change shape as when Nagato was pierced it was small whereas when Hydra was pierced it was longer than former scene.
3) Not having tangible form means it has no weight so no disruptions in it's speed so it's pretty fast... and Itachi has light speed reactions as Databook claims( his feat against Kirin which is confirmed light-speed..).
4) Naruto will get sliced, sealed/ plunged with his own attacks reflected back.
5) Tsukiyomi one shots.
6) He has a long range Genjutsu technique which Ao and Shikaku stated can manipulate several individuals at same time without being detected by the best sensory divisions on SA force......Ao himself have detected obito's Yagura manipulation and Kotoamatsukami in work yet his statement provides further intricate hype to Itachi's potency and prowess. I'd say Naruto's Bijuu won't recognize he's in genjutsu.......he'll have plenty of time to stab Naruto while he's in it.
6) Other akatsuki'd be good suppport as they can throw attacks from inside Yata Shield.
Do you've disagreements...?
