get rid of steripen and use AM in small dropper bottles saves 5.5 oz
get rid of heavy water bladder, a 2L platypus weighs 1.2 oz saves 4 oz
lighter compass saves 1.5 oz
get rid of pillow saves 3 oz
get rid of extra ground cloth saves 1 oz
get rid of 1 mini bic, carry book paper matches as back up -save 0.3 oz
get rid of notepad and pencil, save 2 oz. Use smartphone since youhave it.
get rid of schnozzle pump bag, use nylofume liner - save 1 oz
get rid of spare batteries. Put in halfway resupply and conserve . Save 3oz
consider a montbell exlight for puffy with a 1oz beanie , would save 11 oz.
get rid of light weight fleece, you have enough layers with the thermal, windjacket, and puff. saves 8.5 oz Or keep the fleece and ditch the thermal top, about same thing.
get rid of long sleeve shirt or short sleeve. You wont need both with windjacket and thermal top. saves 5 oz windshirt can be worn for sun protection, but really, you can hike in LS in low humidity, Id leave the SS myself.
Thats about 45 oz or close to 3 lbs
You can save another 10 oz with an Xlite pad, and another 10 oz with a 20F quilt or Zpacks sleeping bag, but that starts getting into real $$$ to replace perfectly suitable gear.