Wool is tricky in my opinion. It took me a long time to figure it out. Wool outer layers are great. Quiet, dull, and durable. If you are sitting short periods and even doing some moving around like hiking/still hunt, go wool only without wind blocking layer. But for sitting in wind they can be drafty. So, if you are sitting for long periods, wind block layer is a must. Then layer up underneath. When it's in the OMG it's cold I wear KOM one size larger than I would normally get with wind block layer, down microtherm full long sleeve shirt, 400 wool power, 200 wool power, and Smartwool base layer. I'm sure any good wool/wind block combo is fine. Bottoms: Smartwool base layer, wool power 200, KOM pants. That keeps me warm without too much bulk for bow hunting. Down is awesome. It makes a tiny bit of noise rubbing the nylon on the other layers, but I've never had a deer hear it. Shot my three biggest deer wearing these combos. Muff with hot packs for hands, arctic shield covers over boots with stick on toe warmers for feet.
This season I sat all day in weather less than 20 deg and 20 mph wind all day. That's a long day but I was ok, and I get cold easy.
Hope that helps!