He is though... He beats up on Hulk like its nothing. And SS is above Thor as well, Thor's reaction time isn't anything like Surfer's, and teleportation takes a second. Surfer already beat Cable, and btw both of them were fixing buildings, not just Cable. Nate's durability isn't godlike or anything, Surfer wouldn't need to hit him with a whole lot to kill him. Though he himself can take planet destroying blasts. And Surfer has an extremely resistant mind to telepathy, as he is a semi-adept telepath himself, plus an alien mind. Taking him out through his brain would take Nate at least a few seconds, which he definitely doesn't have.