Sasuke Susanoo scales off of dead ninjas. Only. No summons, puppets or clones.

ah actually it doesnt count, my friend and i tested it. I have that skill trial that gives 10% for every unit, and i tested it against deidaras spiders and narutos shadow clones, from round 1 till round 5 his dmg against the enemy pos.1 stayed around the same 3-4k, depsite me killing like 15 spiders and clones meaning that it should have bumbed it up to around 8k

Are clones, spiders, sharks a Unit? Why yes, yes they are. So yes, Sasuke does get scaling with those. You probably cant see it because he does not innately have that ability (skill Trial).