if you hit a shadow clone with a rock they poof they are useless the kunai is burnt right up aswell not to mention a kunai is never landing on a moving susanoo sasuke turns the the battlefield into enton minato is overwhelmed and he loses this
I remember Minatos shadow clone was kicked by Juubito and sent flying back, yet it didn't go poof did it. All the clones that Naruto sent to other battlefields didn't go poof, one even crashed into a tree if I remember correctly against black zetsu and just got up. Pain hit several Naruto clones with an almighty push and a few of them managed to brace impact. Hiruzens clones even survived the toll of RDS U_U There are many more scenarios of clones tanking a lot more. Anyway, that's only if Sasuke can hit a teleporting clone.
The clone only needs to make one touch before sacrificing itself.
A kunai? How about several kunai. We've seen minato throw over 20 at once. And how does Sasuke turning the battlefield into black flames overwhelm minato when he can just run to a safe distance or teleport away. Scan of burning a whole battlefield with plz, because I'm pretty There isn't enough chakra in the world to burn an entire battlefield lol. And wouldn't Sasuke just restrict his own movements. If he lights up the battlefield, where is Sasuke going to stand?