If he gets 2 microphones I think it would be fine. But his microphone set to their normal talking voice doesn't really handle his screaming to well.
Having one with lower gain would help, but that would also lead to more work in edit to switch between the 2. This is how AVGN does it, which is why is screaming is something you can listen to without your ears breaking. Bar his earlier stuff.
But this is going off-topic