Lots of smart choices there. The Big 3 look good, except maybe that 16 ounce sleeping pad. It appears to be OV’s 22″-17″x72″ tapered mummy pad at 16 ounces. If you can accept a 48″ length (and put your pack under your feet), there are 8 to 10 ounce options. I’d be torn, myself. I’ll often do that on a weekend summer trip, but for a 10-day trip, you want to sleep well every night.
Super low-hanging fruit: leave the 4.4 ounce stove for car camping and get a $15, 0.9-ounce BRS-3000T. Only $4 per ounce saved!
Consider a bamboo spoon. For $1. Sometimes can be found at Safeway. It will only save a gram or two, but they’re stronger and some people prefer the feel in their mouth.
Instead of the 1.9 ounce headlamp, I’ve been liking the 10-gram = .35 ounces, $10 NiteCore Tube. 1 lumen (for over 60 hours) which is what I hike with or 55 lumens for occasional route-finding. Rechargeable so you always start a trip with it fully charged. Lights for hiking belong in your hand, not on your head, so you can see bumps and dips in the trail, IMNSHO. I’d want a lot more (lumens and spot function) for off trail, but for improved trails, it’s enough for me. I assume you mean Summer *2020* which means long days, lots of light and not a lot of night hiking.
Having skinned and butchered a bear with a 1-inch blade, I argue you don’t need anything more knife than a 0.74-ounce Victorinox Classic. And it has scissors which can trim bandages, tape and open packages with FAR less risk of injury. 2.9 ounces less 0.74 ounce is over 2 ounces saved for $5 (for a TSA seized one) or $16 new.
FAK at 5 ounces seems heavy to me. Especially for week-long trips on an established trail. A few bandaids, a little foot care stuff and some pills in a pint Zip-lock = 2-3 ounces. Skills > gear when first aid is needed.
Mini Bic lighter to light the stove? That’s about the only thing I’ll take an extra of because it’s 1) far better than rubbing two Boy Scouts together, 2) a light source, 3) can help repair gear, and 4) emergency gear if you need a warming fire.
Tiny fire starter? Like 6″ x 6″ of wax paper.
Lip balm?
Sun screen?
Sun hat / Sunbrella? Lots of UV up there. I’m going in Tuesday for a little “weight-loss surgery” as I like to call having another basal-cell skin cancer (#8) carved off. I feel 10-15F cooler under a Chrome Dome at 9,000 feet in the Sierra.
Repair kit? (an ounce total of heavy sewing needle and heavy thread, Tenacious Tape, 2 safety pins, 20 feet of 100-pound-test Dacron line). The tape can be stored on your water bottle or trekking poles (replace it each year!).