Hope you have a great trip. Some thoughts:
-baselayer midweigth size S
-fleece 100wt size S
-windshirt hooded New Balance W size M - (fit is on the short side as with most women's garments). This is quite breathable and doesn't do much in rain. The hood is small, zips up to bellow the chin and will go under the helmet.
I wouldn't like this. I take my hood on and off all the time depending on active I am. I would get a windshirt that goes over your helmet and, just as important, stays tucked in under a harness. Fit is super important. Maybe you can find a slim and long men's jacket. Or sew your own. Just take a garment that fits and cut it up into pattern pieces.
-down parka OR Maestro size S
If you get stuck in a storm and have to dig a horrible snowcave and then wait there forever, brushing up against the walls and getting wet, or having spindrift blow in all over you, a synthetic parka would be better :p
-I'm pretty sure a hardshell will be needed, which brings us to the first question: would you want the hardshell to layer under or over the down parka?
Trading down for synthetic will help. Hardshell under parka.
I already have these shells:
-SD Microlight W size M - doesn't fit over the Maestro
-SD Microlight size L
These 2 are PU coated polyester, don't breathe, promote condensation and are not seam sealed. The hoods zips up to about chin level.
-Wild Roses 8000m parka W size L
-Mammut Extreme size L - this one is really big on me
These 2 are old (~11 years) Gore-Tex XCR harshells, burly and heavy. They have pit zips, velcro cuffs, hoods that zip up (or velcro) to nose level and would offer the most wind protection.
These and the SD size L fit over the Maestro with room to spare.
I don't know. I would probably skip the hardshell and be really proactive about turning around.
-For the lower body I'll wear:
-softshell pants OR Supercharger size S - nice and slim cut
I'm thinking I'll need another layer for the pants, but not sure what to choose from these:
-M65 army pant liners. I have 2 pairs: an equivalent to small but they are short and I'd have to take the boots off to put them on; an equivalent to medium, acceptable length and have buttons on the sides, so no need to take boots off, but heavier than the other pair (400g vs 250g).
Don't take your boots off.
-hardshell pants Mammut Extreme size M - these are Gore-Tex, old, heavy and really burly. They have strong reinforcements on the behind, knees and insides of the lower legs. They also have suspenders, side zips and side velcro, snow cuffs.
So it sounds like you have a great start but there are some heavy layers you might think about replacing. You can save your nice, new, lightweight outfit for special occasions, like climbing big mountains, and it will last. Don't worry about durability. Just patch stuff. I'm guessing that your pack, harness, biners, rope, boots, ice screws, ice ax, crampons, stove, shovel, and all that other heavy stuff is already dialed in. Otherwise lightweight new clothes don't matter much.
Here's what I would wear:
warm single boots
mid weight sock
body-glide or some blister stuff
thin long underwear
thin stretchwoven pants
waterproof shell that goes on over crampons
thin long sleeved shirt
hooded fleece pullover
thin softshell glove
spray everything with DWR
pack should weigh less than a pound
check the weather continually
train train train
and of course other stuff like water and headlamp, etc., but what I'm getting at is that I would just bring the lightest stuff I could afford and think about it as a system, plus the bare minimum of emergency stuff, and be ready to flee to safety if the weather started turning.