Not sure if serious. Madara's individual halves of the two powers aren't as potent as Naruto's RSM and Sasuke's 6T, not to mention that was Shinjuu-absorbed Madara that said it. Even disregarding that, Naruto and Sasuke were spanking Madara and forced him to go take his second Rinnegan, so by your statement he should've beaten them easily, right?
Comparing a portion of non-Shinjuu JJ Madara's chakra to Sasuke's half of Rikudou's power is simply ludicrous, so I'm not gonna address this any further.
Yeah, which was before he handed them their powerups. Obviously he knew that combining the reincarnation's power with his own two halves would be plenty to stop Madara, especially since it was nearly enough to stop Kaguya herself.
What? :lol. So you're basically arguing for a fanfic DMS Kakashi? Because his power ran out in canon after a single PS usage, so I'm using the canon material to prove how his chakra level (and thus, PS) isn't near to equal to Sasuke's.
Are you even serious with the last part? Give Sasuke Kamehameha and he can wipe out NV, what's your point? By the way, Adult Sasuke's PS would still be stronger than a hypothetical JJ Obito's, though the difference would definitely be small.