There is still a clear problem of scale here.
Manga and Anime contradict each other a lot, but they are both canonical, the overall scales of the manga are extremely confusing, clearly Kodachi had no idea what he was doing, and the anime sought to correct the bullshit he did.
In the manga, Sasuke fights Kinshiki 3x (ice dimension, arena, Momoshiki dimension). And in absolutely none of them he shows fatigue, he is always the same (only with the Sharingan). And at the 3 fights he is pressured by Kinshiki. After that, his only feat against the fused Momoshiki is to simply attack him from behind after Momoshiki is thrown away by Naruto. After that he caught by Momoshiki's Jutsu and does nothing against him alone. And in no time did he use EMS.
In the anime fight is different, Pierrot literally corrected the whole scale, we must not forget that in the anime, Sasuke has the Lightning Shunshin and the EMS. In the first fight with Kinshiki (ice dimension) he used only Shunshin + Sharingan, and was clearly fatigued, he even staggered at the end. The second time (exam arena) he doesn't use Sharingan or Lightning Shunshin, and still manages to oppose Kinshiki even though both are not using the Lightning Shunshin. The third time (Momoshiki dimension) Sasuke was only with the Sharingan and without the Lightning Shunshin, while Kinshiki didn't use the Lightning Shunshin either (and eve was pressured for the kages). And in the fight against fused Momoshiki, Sasuke with the Sharingan and without the Shunshin was obliterated, and after that, he activates the EMS and uses the Shunshin to fight with Momoshiki, which clearly demonstrates that he saw the need to amplify himself in order to fight .
Basically, in the manga it would look like this:
-Sasuke fight with Kinshiki 3x and is pressured at all, and doesn't have a direct confrontation with the fused Momoshiki, so he is comparable to Kinshiki and inferior to Momoshiki. For there is no justification for putting him and fused Momoshiki on the same level.
In the anime it would look like this:
-Sasuke + EMS + Lightning Shunshin = Fused Momoshiki > Fatigued Sasuke + Sharingan + Lightning Shunshin = Kinshiki + Lightning Shunshin > Sasuke "base" + Sharingan = Kinshiki "base".
The "base" means they are without the Shunshin.
So which one will we use? the factor of the existence of EMS and Lightning Shunshin, and Sasuke's clear need to use both for fighting with fused Momoshiki could be a justification for any inconsistencies involving Kinshiki, after all he wasn't at his maximum against Kinshiki, so i vote for using the most consistent