A quick list of some weight savers we use:

Aquamira squeeze bottles--no pumps.
Pocket rocket stove with igniter and two small gas bottles (always more than enough)...no liquid gas or hoses ever. (!)
8X32 HD bincs...large objective glass is a waste up there. One exception--I pack/wear geovid hds that we all use for the rangefinder technology.
Spotter: Leica apo 62mm angled televid with zoom. 3lbs tops. Pedco 3 ounce tripod.
Piranta havalon knives.

Rab summit mountain tent 3lbs 14 ounces...breathable 'event' and bomber all the way.
Integral designs Siltarps (ounces) for meat/gear protection and as umbrella for 'airing' meat...

I'm sure there is more, but it's fun seeing how we all get to similar places with the lightweight gear.
Experience can be a tough teacher!