we never seen Superman take a punch from Ironfist who's to say it wont knock his head off?
Considering we've seen Superman tank hits of various energy types, and pure physical damage, high in excess of what Iron fist has shown, chances are that it wouldn't.
We havent seen Superman take a slash from Wolverine whos to say it wont work?
We've seen Superman take slashes from regular knives, which simply glance of him, and other than the fact that Wolverines claws are made of a nigh unbreakable metal, there's nothing special about them, so by simply applying a bit of logic to it, something that you seem to be unable to do, we can say that Wolverine wouldn't be able to hurt him.
So basically, your stupid attempts at logic, are stupid and not really logical.