It wasn't used because it's irrelevant. I suggest you stop making excuses. It makes your argument look pathetic.
Excuses, huh? You better start understanding stuff. I suggest... Just because you are unable to perceive the proper and effective use of Rinnegan in battle doesn't make it irrelevant, it only makes your comprehension look pale. There are a lot of things Rinnegan is/was capable of on several occasions (not necessarily in terms of raw power), and those weren't used to keep Sasuke on Naruto's level.
See, here we go. You making one excuse after another, and this one doesn't even begin to make any sense. The Bijuu increased the POWER of his Susanoo. Period. Bijuu PS>>PS. Indra's Arrow being his most powerful technique either means that it's a technique he can only use when he has the Bijuu Chakra, or he can use it w/o the Bijuu chakra, but it'd be weak in comparison to what it was w/ the Bijuu Chakra.
Him using the Bijuu Chakra to create his arrow doesn't change the fact that it's his arrow, so there is no clash here. You are only trying to create one to validate your piss poor excuses.
Alright, I'll agree that Bijuus' chakra increased the power of the Susanoo and its techniques (for the sake of argument). Which means Sasuke can't produce Indra's Arrow to the same power again, since he doesn't have Bijuus' chakra anymore. That's done. But what guarantees that Naruto will be able to collect the same amount of natural energy at the right time to counter Sasuke's "weaker" Indra's Arrow? Nothing. Naruto was only lucky that it happened, it's not something that could happen whenever Naruto desired, just like Sasuke can't get the Bijuus chakra whenever he desires. Which means Naruto's supercharged Rasenshurikens would be similarly weak as Sasuke's Indra's Arrow. You're neglecting the same disadvantage for Naruto. Ignorance at its finest!
Plus, Sasuke could even produce the "weaker" Indra's Arrow at the very start of the fight when Naruto would have absolutely no natural energy to produce rivalling attacks, even Naruto's most powerful attack at that time would be no match for Indra's Arrow. How about expanding your thinking capacity and considering that?
And even if those reasons aren't enough for you, let me devise further counters to help you out. Sasuke could absorb the natural energy Naruto (actually Kurama) collects for the supercharged Rasenshurikens using Preta Path, and use it to produce Indra's Arrow (assuming Naruto gets lucky enough to collect the same amount of natural energy as before), which will produce a similarly powered Indra's Arrow leading to stalemate. Or he could simply use Ameno to dodge the attack, no harm done to anyone. Or he could potentially use Ameno to swap places with Naruto, and put Naruto in front of the approaching Rasenshuriken attacks. There's absolutely nothing Naruto could do, even with his Kurama Avatar to evade or stop the attack. He will have to take the full force of the attack which will cause massive damage, Naruto gets wrecked. Sasuke remains unharmed in all of those scenarios.
The point is whatever excuse you make, you can't change the fact that Rinnegan Sasuke > RSM Naruto (if Sasuke uses his powers intelligently and to their full extent).
The fact you are mentioning Animal Summon in a fight against RSM Naruto only shows me why I can't take anything in this terrible post of yours seriously.
The fact that you think I'm mentioning Animal Path summons to fight on equal terms with Naruto's RSM Kurama Avatar only shows how damn stupid you are. They are obviously side helpers, and definite distractions and hurdles for Naruto since they can't be eliminated, and will keep causing problems for Naruto. The main fight will obviously be between Sasuke's PS and Naruto's RSM Kurama Avatar, which these summons as sidekicks for Sasuke. Sasuke will have the upper hand against Naruto even with all his toad summons.
Human Path? When he is fighting Naruto w/ Susanoo? Go on. Tell me how that makes any sense. Stop making excuses.
Rip out Naruto's soul when the RSM Kurama Avatar disappears (Naruto isn't going to stay in his avatar forever)... And I know you are going to make stupid excuses so I'll counter this in advance. If you say Sasuke won't have enough chakra, then listen up. Sasuke will first absorb enough chakra from Naruto using Preta Path to use Human Path to rip out Naruto's soul when he's weak enough. Little things can be immensely helpful.
If Sasuke was better off using his Rinnegan to fight Naruto, he would've done so. That simple.
I'm sorry, but weren't you listening to me when I acquainted the reason Sasuke was restrained from using Rinnegan to its full potential. Kishi dumbed down Sasuke's powers to keep him equal to Naruto. That's the reason Sasuke didn't use his Rinnegan to its maximum extent. How could he have "done so" if the plot restricted it? Even Kurama noted that Sasuke was not able to use Preta Path along with other techniques. This limitation alone made them lucky. Imagine him being able to use Rinnegan (Six Paths techniques) to its full potential in that fight. He'd have wrecked Naruto (that's if the plot allowed it).
Kishi made it clear that in his Manga, Naruto is stronger than Sasuke w/o the Bijuu. Everything and anything else is an opinion that I don't care for.
Kishi didn't do that. You believed that of your own accord because you only see things from the surface and ignore the minor details.
Yeah, read it. And my argument still pertains.
That's a terrible strategy. If he's using Preta Path, he can't use Susanoo. Naruto would be able to take him out with anything that isn't Ninjutsu related while Sasuke is busy absorbing all the big attacks Naruto is throwing at him. Kokuo's Kariki Musou increases Naruto's physical power beyond that of Kaguya's chakra arm. He'd paste Sasuke w/o one hit while he sat there, stupidly absorbing all of Naruto's big attacks instead of countering with Susanoo.
There are two things I can conclude from this. Either you're darn stupid and didn't understand what I was trying to say (I didn't call Preta Path an alternative of Susanoo, for f***s sake. Just because he used Susanoo doesn't mean he can't use Preta Path at all ever) or you maybe forgot to read the rest of fight after PS and Kurama Avatar got destroyed, and failed to notice all the opportunities Sasuke got to absorb Naruto's chakra (which he didn't avail), or you were not able to conclude the application of Preta Path during that time period.
Naruto won't have the Kurama Avatar activated all the time and till the very end of the fight. As soon as he can't maintain the Avatar, Sasuke will take advantage of than moment and start absorbing his chakra. Sasuke could've absorbed Naruto's chakra during their taijutsu fight (which he didn't due to plot restriction). And when Kurama gave him more chakra, he could've absorbed that as well. The fact that he used Preta Path so late didn't allow him to absorb Naruto's remaining chakra. He only absorbed what Kurama gave Naruto, which wasn't enough to kill Naruto from chakra shortage.
Sasuke at full power couldn't beat Naruto. He tied. You are going to have to deal with it.
Yeah, apparently he couldn't defeat Naruto (because the plot didn't allow it). But he CAN defeat Naruto, POTENTIALLY. And whatever you say, I'm always going to judge their power by their potential, and not by the result of their fight. If you want to continue with your immature approach of judging their power by the results of their battle, go on. I can't stop you...
What's funny is that in the process of making excuses, you've either intentionally or accidentally forgotten how to read the Manga. At the end of the fight, his Rinnegan was useless. He didn't have the chakra to maintain it, period. So how in the hell is he going to use Ameno? Lmao. Enough chakra to use Chidori Enton=/=Enough chakra to use his Rinnegan, which was closed from the moment his Avatar was wrecked to the end of the fight.
What's funny is that in the process of defending Naruto's weaknesses against Sasuke, you also either intentionally or accidentally forgot that Sasuke also lost control of his EMS powers when he was about to hit Naruto with Chidori (right after absorbing Kurama's chakra). But following that occurence, in the end of the fight, he used Kagutsuchi along with Chidori with the EXACT SAME EYES i.e. he used his EMS powers, which he evidently lost control of. He could do the same with the Rinnegan if he preserved chakra. I'm sorry to say, but that's the case.
And what's also funny is that in the process of spewing bias, you either intentionally or accidentally forgot that Sasuke used Preta Path to absorb Kurama's chakra from Naruto AFTER SUSANOO GOT DESTROYED i.e. after Sasuke lost control of his Rinnegan according to you. And I'm a 100% sure that Preta Path is a Rinnegan technique, which means he could use the Rinnegan apparently. Sorry if you don't like that fact.
Also, Kurama said that they were lucky he couldn't absorb and cast jutsus simultaneously, and I'm affirmative that absorbing ninjutsu is a Rinnegan technique (Preta Path) which indicates he could still use the Rinnegan if he wanted to.
I apologize for not falling victim of your bias and ignorance, and I'm also sorry to demolish your negligence and stupid excuses through logic, but that's the way it is. Against me, only logic and correct inference will work. I can't let you carry on with that, atleast not when you're arguing with me.
Kishimoto showed that Naruto=Sasuke w/ outside power>>Sasuke. End of story. Your opinion means nothing in the face of what the author has portrayed.
Don't put the conclusions of your pathetic comprehension on Kishimoto's account.