the chakra absorption would have done him in. also naruto had many toads to help against summons, snakes are not up to the same standards as toads, sorry if you disagree, but they are the best summons. just think that if sasuke would have been put in that same situation that he would have had a much harder time. that's just the was i see it. also sasuke doesn't use shadow clones to help with the number difference in this fight. he'll probably take out the animal realm, maybe the machine one too, but thats all i see him doing. one deva realm gets his powers back he'd be done, as he has nothing to compete with said abilities.