I always use a WG stove. An*old* SVEA works for everything I have needed in any temperature I have ever been out in. Highly efficient with fuel, despite the priming.
It burns ~6-10grams of WG per liter on low, about 15 grams per liter on high. It does NOT burn real hot, only producing around 5000btu. So, it is nice for melting snow. The stove weighs about 19oz. And it holds about 130g of fuel. In winter it helps to have a "midi" pump for it. And, a small piece of foam to sit under it. A windscreen is important, but use caution, the stove can overheat. I prefer to have one for all camping. And I prefer an ultra reliable stove, so the SVEA Climber is the one I carry. The only thing you need to move is the valve to control it and cap to fill it. The rest is simple physics.
Alcohol does not work all that well at those temps.
Canisters also fail around that temp (unless you have an remote inverted canister stove.)
Kero stoves tend to be a bit messy and just as heavy.
Other WG stoves burn LOTS of fuel. Typically, around an 23-25g per liter, some more than that.
There are a LOT of stoves out there. Selecting a stove, like everything else, is a matter of trade offs. Reliability, efficiency (in terms of size and fuel usage), and weight in about that order.