There are many quality technical downs you can get. Those will keep you warm for sure.
If you want to beef up your base/midlayer, go with the Under Armour base 4.0. That thing is a really warm base layer. Then throw a heavy mid-layer crew over that. Then your fleece hoody and insulated jacket. Bring a backpack with you. Take it off at the top of the run if you find that you get too sweaty during the run with all those layers on. Minor hiccup to deal with, but at least you'll be warm on the chair.
For socks, get the thicker Merino Wool variety.
For gloves, go with mittens (also available in down) and a thicker glove liner.
If you still freeze after all this... time to bring a battery powered space heater for the lift ha.