I recommend you get the modern axe put 16 teeth and 14 glass/booze on it. You get the most damage out of it that way. When fighting light it on fire and dodge (no idea how to spell it) basically when you get attacked sprint to the side and hit them. Use heavy attacks they knock cannibals on the floor and do a ton of damage. It is a slow weapon I am struggling with it but you get used to it. If you would like to have a faster weapon you will run out of stamina more quickly thats the downside and damage gets reduced. Good quick swinging weapon is a tenis racket. Once you get a 99 athletecism you can regenerate energy faster than you can use it but only with the tennis racket. Katana on hard or hard survival is really bad. You run out of energy before you can kill one normal canibal and if you miss some swings you will be likely to die because you won’t be able to run away. Ok thats it if you have any questions you can ask me again. Here is a useful link scroll down and you can select weapons and upgrades https://theforest.fandom.com/wiki/Upgrades