And you don't need to go single wall to cut weight on a tent...the tarptent notch is only 24 oz, and I use a cuben fiber duomid with a net insert and it only weighs 20 oz total.
It actually IS the items you are taking...and as other posters have mentioned, don't poo-poo the 2-4 oz you save on items here and there. I used to do that, and now my list is just under 10 pounds and I have all the luxuries I used to bring. Including sleeping clothes (which can double as a base layer if it's cold) and a nook to read.
Pack: GG gorilla
Quilt: EE revelation 20 deg with a tad extra down
Pad: exped downmat UL 7 (I also sleep cold, and no skimping here!)
You can easily shave a pound off your sleeping bag, and a pound off your tent even if you went with something like the Notch, or a tarp with an inner net. I can't stand bivies...yet...but I may try one day. I really like to hang out in my tent and read, or cuddle with the dog, so a bivy kind of gets in the way.
My stove is Zelph's modified starlyte that I use in a caldera cone...with a 600mL pot. Not sure why you need so many pots, or why they need to be so big. I do some cooking as well and this is just fine for that. And to be honest, it's very, very convenient. I like it WAY better than my canister stove system. And if you do choose to stick with the canister, why bring the big 8oz canister? 4 can get you through a good 8-10 day trip of cooking 2x/day
Go with mini bics. Yep, it's teeny, but I found most of my weight savings comes from the teeny stuff. Wow that little stuff adds up, and you usually end up not paying attention to it.
First aid can really, really be cut back. There is a lot of discussion on these forums about it, but keep in mind one simple rule: either the injury is minor and you can deal with it using some band aids, or it's not, in which case your trip is over and you need to evacuate. You aren't going to be sewing yourself ala Rambo, and you can make splints using poles (tent or trekking) and clothing.... All your first aid kit really needs to be is a few bandaids, maybe one or two bigger pieces of gauze, some anti-histamine, pain meds...any prescription drugs...that's about it.
As far as clothes: dress in layers based in the weather. Bring one single set for hiking in day after day (I wore the same shorts and shirt and bra every day for 19 days on the JMT...you're going to stink anyway, just don't need to carry so many stinky clothes). I had a dry set of sleeping clothes that I packed in with my quilt (tights and a grid fleece), 2 pair of socks is all you need: one you are wearing, the other has been washed at camp and you are drying them. If it's a short 3-4 day weekend trip I'm only taking a single pair anyway...I sleep in my down booties if my feet need to be covered. So all my clothes bag has in it is the tights, a grid fleece for sleeping (or whatever, depending on the temperatures), a single spare pair of socks, a single pair of spare undies (I'm a girl - need to at least swap out every day or two, and wash) and my down booties.
Now, I keep seeing people talk about comfort and giving things up...honestly, to get to 10-12 pounds of base weight I don't think you have to sacrifice comfort at all, nor do you have to give things up. What you do is NOT take things you aren't really going to use (seriously? 1-2L pots?), and take lighter versions of what you do need. I was so wary of going lighter that I resisted for such a long time...but honestly, if I look at my gear list I really don't see anything I'm giving up, or sacrificing for the sake of weight savings.