Okay now I know you're a fanboy. A was going to legdrop him which would..
1) Break his Susano'o while also breaking his face into tiny little bone fragments
2) Burn A's leg to where he would no longer be able to walk
^ Sorry but um, Sasuke would be dead and A wouldn't be able to walk. I'm pretty sure that means A would win, Sasuke was so badly beaten than he had to use Amaterasu flames around his "Ultimate Defense" Susano'o and yet Raikage still smacked Sasuke in the face through both Amaterasu and Susan'o, just to do it, he didn't have to, he could have waited for Sasuke to run out of chakra. Your precious Sasuke is not as strong as you make him to be, he's weak compared to A.