I think it requires a special mind to have that little as you bring and I wanna start carrying. I was very good at keeping my stuff down but even then I had stuff I didn't need.
A few tips: try to go with only one set if spare cloth. So you have one on you and one clean set in you bags. If you accept being dirty and bring a very small anti smell deo for under the arms you will quickly not mind.
Rest of your stuff put it all out on the floor and put everything you absolutely need in one pile and all the the "nice to have" in another. You will be surprised how much you can cut off like that:)
Thanks, good tips!