A mere Senjutsu rasengan was able to do this to Juubito,
Imagine what a Senjutsu Rinbo Hengoku can do.
This Senjutsu RH is obviously much much more powerful than the pathetic Rasengan that SM Naruto dealt Juubito.
Sure the Rasengan was done via Senjutsu, but still pathetic nonetheless.
Sure the Bijuu didn't explode, but they don't have a Kryptonite like weakness associated with Senjutsu that Juubito has.
If a SM Rasengan was able to create a large hole in Juubito, then 20 SM Rasengan's would kill Juubito if correctly landed. Well, SM RH is like a billion SM Rasengans, at least.
No wonder Madara was so confident about being able to take down Juubito by using the strongest Sage Mode: Hashirama's Sage Mode.
RH can't be dodged and it packs the impact of a super nuke!!