Dump two handed Katana, add Spade and wate rpurification device

The Two handed Katana adds a lot of valuable weight. I would suggest a Cold Steel SF Spade instead. With sharpened edges it could be used as a weapon as well as a cutting tool, plus you could dig with it. Digging can be really valuable out in the wild since you can dig a shallow trench around your tent, protecting against heavy rain, plus you also could use it as an axe.
I would also recommend some device to purify water, either a water filtration system or purification tablets