Last night I was playing PZ and I was using the hammer (with the strong perk but I have used it many times without it) and the hammer is very op. You almost never get exhausted from swinging it , it takes a very long time to break and it does a lot of damage. The only thing slightly balancing it would be that the reach is short but that has not been an issue in my multiple hours of using it. One way I think it could be balanced is slightly lowering the damage and making it break faster but these are my only two ideas.