~5000m Gear Input - 3 Passes - Nepal - early March 2018

Hello all,
After reviewing all the threads on the board and doing much reviewing and tinkering regarding gear, I would like some input on my kit. I am carrying solo, and staying in tea houses. Weight is a concern, but I am well into my training routine, lugging about 10kg of water. If at any time I feel uncomfortable, I will get a guide/porter. I've spent a little time with snow around in the Snowies, but I am no alpine hiker.
I have about a week at ~5000m. Days in March at that altitude top out at around -10C, nights get down to -25C, tea house rooms are not heated. This is the period I am concerned about. I think I have a nice layering set up for the days, with plenty of flexibility. I have fresh base layers for sleeping and am happy to layer up again at night as required, and spoon a couple warm Platys.
Sleep gear will be a Tiergear Possum 180 -1c Wide Top Quilt (Primaloft) with a Thermaltake Thermalite Reactor Extreme Liner. I also own a Sol Escape Bivy I could use to supplement the liner and quilt. Tea house blankets will be used as well. Most guided tours recommend a -10C or -15C bag, and I am way out of that range.
Q1. Should I buy a more appropriate bag, and streamline my setup?
Rain/wind gear will be a Marmot Essence jacket and Marmot Precip pants, of course I will also have insulation options under these if needed. I also own a cheapie (lined) Aldi Goretex jacket and pants, but to me these feel over the top for the day and I am not planning on taking them.
Q2. Is the thin rain/wind gear appropriate for these altitudes and temperatures, or should I go for the cheap Goretex?
I walk warm once I get going, so I am expecting to go most days wearing only Mountain Designs Glacier Softshell Pants on my legs. I could add the base layer I plan to carry in an emergency/cold day.
Q3. As above, are the Glacier Softshells appropriate, or should I look to add fleece pants or similar to the kit as well?
Thanks in advance for any advice
Head
Baseball Cap 100
Buff 40
Sunglasses 40
Glasses 100
Windproof Balaclava (bike) 65
245g
Hands
Montane Prism Glove 52
Montane Minimus Mitt 44
Watch
96g
Upper Body
MacPac Merino 220 base layer 240
Shirt: XTM Merino Mens T-Shirt - Black 170
Lyell Merino 180 Polo Shirt V2 Mens Charcoal Marle XL 260
Rain/Wind Jacket: Marmot Essence XL 180
Kathmandu Hooded Merino Mid Lite 449
Macpac Pulsar Insulated Hooded Jacket (Primaloft) 450
1749g
Lower Body
MacPac Merino 180 Boxers Mens 100
MacPac Merino 180 Boxers Mens 100
MacPac Merino 220 Pants Mens 180
Mountain Designs Men’s Glacier 16 Softshell Pants 447
Rain Pants: Marmot Precip Pants 252
1079g
Feet
INJINJI SPORT CREW PERFORMANCE TOE SOCKS – BLACK 50
INJINJI SPORT CREW PERFORMANCE TOE SOCKS – BLACK 50
Icebreaker Heavy Wool Socks 100
Sealskinz Trekking Thick Mid Socks 100
EXTREMITIES TAY GORE-TEX GAITER , BLACK, L/XL 90
Ankle guards x 2 (nylon strapping) 100
Mountain Design fleece booties 60
La Sportiva TX4 APPROACH 760
Edlelrid Spiderpick Snow Chains 474
1784g
Pack
Osprey Aether 70 XL 2350
Sea to Summit ULTRA-SIL® PACK COVER 130
Black Diamond Trail Back Trekking Poles (Pair) 608
Leatherman Multitool (hip pouch) 150
3238g
Sleeping
Tiergear Possum 180 -1c Wide Top Quilt (Primaloft) 750
Thermaltake Thermalite Reactor Extreme Liner 400
Sea to Summit AEROS PREMIUM PILLOW 114
Earplugs 5
1269g
After reviewing all the threads on the board and doing much reviewing and tinkering regarding gear, I would like some input on my kit. I am carrying solo, and staying in tea houses. Weight is a concern, but I am well into my training routine, lugging about 10kg of water. If at any time I feel uncomfortable, I will get a guide/porter. I've spent a little time with snow around in the Snowies, but I am no alpine hiker.
I have about a week at ~5000m. Days in March at that altitude top out at around -10C, nights get down to -25C, tea house rooms are not heated. This is the period I am concerned about. I think I have a nice layering set up for the days, with plenty of flexibility. I have fresh base layers for sleeping and am happy to layer up again at night as required, and spoon a couple warm Platys.
Sleep gear will be a Tiergear Possum 180 -1c Wide Top Quilt (Primaloft) with a Thermaltake Thermalite Reactor Extreme Liner. I also own a Sol Escape Bivy I could use to supplement the liner and quilt. Tea house blankets will be used as well. Most guided tours recommend a -10C or -15C bag, and I am way out of that range.
Q1. Should I buy a more appropriate bag, and streamline my setup?
Rain/wind gear will be a Marmot Essence jacket and Marmot Precip pants, of course I will also have insulation options under these if needed. I also own a cheapie (lined) Aldi Goretex jacket and pants, but to me these feel over the top for the day and I am not planning on taking them.
Q2. Is the thin rain/wind gear appropriate for these altitudes and temperatures, or should I go for the cheap Goretex?
I walk warm once I get going, so I am expecting to go most days wearing only Mountain Designs Glacier Softshell Pants on my legs. I could add the base layer I plan to carry in an emergency/cold day.
Q3. As above, are the Glacier Softshells appropriate, or should I look to add fleece pants or similar to the kit as well?
Thanks in advance for any advice

Head
Baseball Cap 100
Buff 40
Sunglasses 40
Glasses 100
Windproof Balaclava (bike) 65
245g
Hands
Montane Prism Glove 52
Montane Minimus Mitt 44
Watch
96g
Upper Body
MacPac Merino 220 base layer 240
Shirt: XTM Merino Mens T-Shirt - Black 170
Lyell Merino 180 Polo Shirt V2 Mens Charcoal Marle XL 260
Rain/Wind Jacket: Marmot Essence XL 180
Kathmandu Hooded Merino Mid Lite 449
Macpac Pulsar Insulated Hooded Jacket (Primaloft) 450
1749g
Lower Body
MacPac Merino 180 Boxers Mens 100
MacPac Merino 180 Boxers Mens 100
MacPac Merino 220 Pants Mens 180
Mountain Designs Men’s Glacier 16 Softshell Pants 447
Rain Pants: Marmot Precip Pants 252
1079g
Feet
INJINJI SPORT CREW PERFORMANCE TOE SOCKS – BLACK 50
INJINJI SPORT CREW PERFORMANCE TOE SOCKS – BLACK 50
Icebreaker Heavy Wool Socks 100
Sealskinz Trekking Thick Mid Socks 100
EXTREMITIES TAY GORE-TEX GAITER , BLACK, L/XL 90
Ankle guards x 2 (nylon strapping) 100
Mountain Design fleece booties 60
La Sportiva TX4 APPROACH 760
Edlelrid Spiderpick Snow Chains 474
1784g
Pack
Osprey Aether 70 XL 2350
Sea to Summit ULTRA-SIL® PACK COVER 130
Black Diamond Trail Back Trekking Poles (Pair) 608
Leatherman Multitool (hip pouch) 150
3238g
Sleeping
Tiergear Possum 180 -1c Wide Top Quilt (Primaloft) 750
Thermaltake Thermalite Reactor Extreme Liner 400
Sea to Summit AEROS PREMIUM PILLOW 114
Earplugs 5
1269g