i think you need to check at someting important with 6path: his standard is pure ninjustu. When unit like kushina, sasuke rinni and kabuto sage are both tai and nin;`naruto 6path is pure ninjustu. So when it's coming to boost like moods it's almost twice the amount in reality (exageration) when for a sasuke rinni will have mostly a 50/50 on tai and nin, making that moods boost less effective.

It's the same reason that make naruto vulnerable to other meta like obito or madara, even nagato edo: pure ninjustu dont hurt them; making them best counter vs him.