Here is what I have learned about pack weight. Want to loose weight off your total hiking set up FAST - loose some damned weight.
Man I could not agree more. Last year I lost 65lb and have since gotten in the best shape of my life, which may not say a lot but for me......

now when I through on my 15 pound bag of gear I am still 50lbs lite compared to what I was, naked, a year ago.
I have always been a minimalist hiker and I preferr off the trail hiking. The only partner I trust to go with me on these tyes of trips is my wife. She is the coolest, hottest, and smartest wife ever!!!!!!.
When we go we preferr winter, nights around 15 to 20 degrees an days no higher than 50. we do not take a tent or bivey. We go very primative making shelter each night and sleeping with a fire buring. We do not use GPS to nav only a mil spec compass and updated topos. I know that if we every where to get seperated she would be just fine.
I still do the AT with some of my collage buds and I get made fun of for going with so little. One even said he was supprised that I was not going naked on our last trip.
All this bing said I will leave a lot of comforts at home and choose to pack more knowledge than gear but my knife and other cutting tools is somthing I will never skimp on. They are what make up the bulk of my weight when I pack. The tools I use the most consist of a chopper and a carver. I find that I need both and a one knife does not fit well here. but if I had to be stuck with just one...........my chopper........no my carver ............no my chopper...........no definetly the carver.....man can't I have my cake and eat it too?
Sericously If I was on a trail wit my buds and I wanted take one blade it would be a 3 to 4 inch blet knife. Convex or FF gind for hard use in a carbon steel with plenty of handle in lenght and width. I need a serious point, nothing too fine or brittle but good for drilling and penitration. The blade shape would need to be a drop point or spear point with out a false back edge. No jimping, I hate jimping. the blade needs to come right up to the start of the handle so no choil is needed, if I am carving I want to use the handle not a bit of metal in front of the handle. Some portion of the blade needs to be squared off for use with a fire steel. I would say close to the tip leaving the rest of the knife rounded and easy on the digits. I dont care about lanyard holes and I never got use to using them so I am indeferent about them. Micarta or some equiventlent for the handle and a good dangler style sheath.
No serations.....ever! Any way my two cents for what it's worth. I would like to think that my life time of experiance has taught me a thing or two but I find that I learn somthing new ever day........GO Fig!
God Bless.