Siggy- take up climbing, THEN buy a rack... a good deal of gear choice is simply subjective preference.
Anyway, I have a cold and can’t climb so (in the spirit of this thread) I decided to weigh some biners and slings (used two Pelouze digital scales, weighed each item 3 times).
Old BD Hotwire: 44gramsm
New BD Hotwire: 38grams
BD Neutrino: 36grams
WC helium: 34 grams
BD Oz: 30 grams
Trango Superfly: 28-30grams
Old Camp Nano: 28-30grams
BD 10mm Dynex and Mammut 8mm Contact slings: 18 grams
Wild Country 15cm dogbone: 8 grams
Of the carabiners, I find the Camp to be unusable, the Heliums to be ideal for almost everything, but the Superfly and Oz biners to be ultra light while still being easy to handle and clip.
So, you can have eight alpine draws with Contact slings and Oz biners coupled with four sport draws with WC dogbones and Oz biners for a total of 896 grams (just under 2 pounds). Lightweight and still user friendly.
Oh, I’ve been using the 9.1 Beal Joker for a few years- very light, decent durability, but with a lot of rope out you can really go for a ride due to its extreme stretch. Not great for cragging, but wonderfull for extended trips.