A few things you missed or might want to reconsider.

First I would look at your pack, for a 1-3 day hike I like 1200-2400 ci internal frames.

Shelter- If you're saving weight military ponchos are a good option as you can pup tent them with 550 cord or wear it if it rains. Otherwise a good packing tent.

Sleeping bag, fleece bag, or poncho liner depending on how cold you're expecting. Space blankets work but they're not comfy.

NAVIGATION!!
Map, compass, and maybe GPS with protractor.

Instead of the wire saw look in to a Pocket chain saw or folding triangle saw. (I've never had a wire saw that holds up for any serious work. My Pocket Chainsaw is 9 years old now, has taken down 12" trees without a problem, I highly recommend it).

Things I take for over nighters and two dayers.
Map,
map compass,
protactor,
pencil,
gps,
in a waterproof neck bag.

Lowe Alpine pack
FAK,
head lamp,
extra AA batteries
whisperlight stove
fuel bottle,
cook set with dish soap and rag,
lighter,
leatherman,
50' 550 cord,
poncho with liner or tent and bag (depends on time of year)
at least 1 set extra clothes,
jacket,
2 water bottles,
micro-filter,
TP,
bug spray,
personal hygine stuff,
flash light (mini mag),
Gerber LMF,
PSK-(basicly a homemade version of Doug's PSK witha few extra goodies)
Food for +1 more days than I expect to be gone.
pocket chainsaw,
asprin,
benadril,
sun screen,

As for bears, all food goes in to my cook pot which I hoist up in to a tree a good deal away from where I'm sleeping. (Just remember to eat good as get to your food for those midnight munchies sucks)