well, it doesnt matter wheter it is the perfect susanoo or something else, anything is under the act of gravitation. nagato will use shinra tensei on its legs and it will fall. or he will use bansho tenin on its legs and susanoo will fall. if susanoo falls on nagato he will have preta path activated. bon appetit for nagato whose preta path will hold susanoo back from nagato and absorb it. or he will fly towards susanoo with deva path and asura boost on feets and preta path activated, directly into susanoo, thanks to preta it will eat susanoo like pacman do it.