Agree with everyone else's suggestions - good starting place but there's still plenty to trim.
Practicing how to range by size calculation of your target means you could replace a piece of gear with a piece of knowledge, which is the most UL practice of all.
Definitely halve the power bank if not ditch it entirely. It's not exactly apples to apples, but I have eaked out 9 days from a single iphone charge when working on trail crew in the Selway - plugged in and charging until the moment you start hiking, then turned off except when needed for the occasional photo, map check, or music on headphones at the end of the day. Always turned to airplane mode when powered on, screen brightness set as low as possible. Always kept in my sleeping bag to prevent the chill at night from sapping the battery.
Are the buis necessary? With your tripod/glass/arca adapters/buble level etc, it seems like you're mostly looking for long range shots, even the 4x on the nightforce should be useable if something bumps into you at close range.
Next two items are based on buying different gear which I realize might not be in the cards but here goes:
Too much stuff in your water system, ditch the bladder/sleeves entirely and switch to smart water store bought bottles rather than nalgene. Steripens are also heavy, require recharging and I personally find it annoying to sit there swirling it around for 60 seconds or whatever, especially when it's hot and I'm thirsty. Throw a sawyer squeeze on the smart water bottle or get a kataydn befree and you're golden. Alternatively, switch to aquamira a and b treatments kits if you're worried about filter failure, and put just enough of each in tiny squeeze bottles. All lighter options then the steripen.
There are much lighter tent options out there, my tent for work in wet/buggy conditions is a Nemo hornet elite Osmo 2p, sub 2lb trail weight (I dont bring stuff sack or footprint) that is very spacious for one person and has 2 vestibules for all your gear. Plenty of other options, I'm just willing to mention them because they replaced this exact tent for free with the updated model after wild horses trampled my old one while I was out working on a fire assignment. As Taskswap mentioned, tarps are also an option and in the Sierra Nevadas in fall are probably a great idea (few bugs, little moisture). Even a non-dcf tarp model will get you sub 1lb for around 100$. If you know the soils in your area will work with them swap out whatever stakes you have for titanium shepards hook stakes. If you use a tarp, bring two msr groundhog style stakes for the trekking pole tieoffs and use the shepards hooks for the long edges.
Sleeping bag seems both too warm and too heavy for this trip, if it's the 15 degree model i see when searching the name. Move to a 20 or even a 30 (and sleep in some of your layers) and you should be able to cut about a pound. WM ultralight or FF tanager to name two options. I slept in a tanager in montana in mid october under a dcf tarp while hunting and was perfectly comfortable. xtherm with its 7.3 r-value also seems like overkill for the conditions - the similar xlite NXT would get the job done and get rid of ~ half a pound depending on size.
Good luck!