the chakra that sasuke took is actually the combined chakra of 9 beasts minus a small part that naruto possessed so it`s at the very least in the same league as the juubi`s chakra...so it`s safe to say indra`s arrow holds more power to it as sasuke could only use it once,meaning he charged the entire chakra on his disposal in this one great attack...
oh and also i am not downgrading anything because there is literally nothing to downgrade,the fully charged juubi TBB wasnt even shown in the manga so how can i downgrade it and how can you just presume it would be stronger than indra`s arrow?
if anything it might be possible that fully charged juubi TBB is equal to indra arrow and no more...however IMO indra arrow is more powerful because its attack is more focused and imbued or should i say transformed into a lightning element..anyway my opinion as it`s kind of moronic to officially conclude one is greater than the other especially because we have never seen a fully charged juubi TBB and the impact that indra arrow would cause to the landscape(because it didnt hit the ground directly)
What I dont like about Kishi is about one of manything that I dislike, its about chakra and usage
he never astablished well the level of individual chakra, like Sakura, how much chakra she really hold, sometime she said she having small amount of chakra left after using it before but on another panels she helping Obito and finally still got many chakra left for her powerful punching to Kaguya
Juubi also is very confussing, even without half Kyuubi, he still got massive chakra but the formost thing here, juubi can build his own chakra to its former level, how is that work Kishi withoug other half of Kurama, you make me confussed here.
That lead me to think that Sasuke is not absorbing 100% bijuus power to equal juubi, if he absorb all , CT will crumble because of no more gravity center.
Are you believe Sasuke Bijuus chakra is build up on the go to equalling full Juubi chakra like that in shott period of time and how massive is Juubi full chakra is?
That the problem and question here.