Be careful with those driducks pants. They're the weekest link in the driducks lineup and while I love their jackets I won't carry the pants due to durability issues with the seams. This could be a serious issue while hunting and possibly busting brush. I have some cheap rain pants (not PVC) from Wal-Mart or the like and while they don't breath they're pretty tough. Since I'll be wearing them over pants anyway I cut the liner out and they're down in the 8 oz range IIRC. Breathability isn't as big of an issue on the legs anyway. Besides, if it's cold and you're sweating you're doing it wrong.
Ditch the parastove. It's dangerous to rely on it for heat and compensating for an underrated bag (for the conditions) but it IS nice. This is -20 oz.per person. If you like cooking in camp it's probably worth keeping otherwise go with homemade dehydrated meals and an alcohol stove like the Supercat. If it's really cold consider using a vapor barrier layer while you sleep (http://andrewskurka.com/advice/techn...rierliners.php
I noticed on Kifaru's website that a trekking pole can be substituted for the rear pole on the Sawtooth. I'd do that if I were you. Reasonably light ones can be bought at Wal-Mart for $10-12. Make sure you get the flick lock ones and not the twist lock ones. The flick locks use the same hardware as Black Diamond poles and seem to work very well for the people I know that use them.
You should also break down the weight of the Kifaru into components. You may be able to save some decent weight by swapping tent stakes and line. Another consideration is bug netting. Does yours have it? Is it built in? Do you need it? Or you could use something like a Golite Shangra La 5 at about 6ft tall and just 46 ounces minus a groundsheet, bug net, pole, stakes, and guy lines. You'd still be able to stand up or almost stand up in it if that's a concern. The stove flap would have to be a custom job on it but it's been done before. Mountain Laurel Designs will do custom orders and may be willing to add a stove flap to one of their big mids. It's a hard call to make from here though because the Golite is just the weight of the canvas.
Sea to Summit Soap: I think your weight is wrong here. That bottle it comes in is probably over an ounces empty I'd guess 2.5 ounces or more when full. Replace with Dr. Bonners scentless soap. Dr. B's is concentrated and only takes a few drops so it can be repackaged into a micro dropper bottle. It can also double for washing yourself and brushing your teeth. There's some obvious weight savings there.
A micro dropper bottle can weigh as little as .35 ounces so figure on saving at least an ounce here. Maybe more. -1 ounce
Ditch the Frontier water filter straw and Katadyn filter for Aquamira drops in micro dropper bottles. About 6 oz. saved here.
Why the Carhart fleece beanie with face mask and balaclava? -1.9 oz.
Cut 1 headlamp. -1.7 oz.
I found the down jacket btw. That's a pretty good one.
Do you have to have the cell phone with you? Will it even work out there? -4.1 oz.
AMK Bivy Sack – It's condensation prone but I assume you'll be base camping so some emergency gear for day hunts is in order right?