Like everything, there's a ways to beat susano'o AND there's a ways to kill with susano'o no matter the tactic one thing i know for sure is, if your fighting him in a tiny stage and he knows how to use it, your pretty much done for, in these cases susano'o doesn't really need to go rushing you, he simply plays football "kicks" the amaterasu and "defends" your tryed escape.
Now if you are in a big stage there's a lot of stuff to use has your advantage,(defencive) first try to distance yourself from him, play by time if he rushes to you jump and def or simply rush too if he planted amaterasu first, turtle till you def or sub amaterasu.(atck) spam your comrades, if you have ranged jutsu spam it too, pressure him with all kinds of stuff and before you know it he's dead or back to normal.
I found myself killing a susano'o with a simple combo lol