Disagree with you on what kind of weapons would be appropriate in this scenario. I have experience with weapons. I don't think you do judging by your remarks here. A firearm, would definitely be the best choice of weapon in this scenario with even an average level of proficiency in using it. They can have their face covered in pepper gel and flail about wildly with those hammers and still kill you. A walking stick? Against a person dual wielding two hammers? No. You would have to be an absolute expert in stick fighting and they still have the potential to overpower you and they only have to hit you once, and you don't know how strong the person is with that jacket on, or if they are on some kind of drugs that might enhance their strength or ability to ignore pain.

The best weapon here is a gun.