Krugman's going to supply your steelman? Sorry, no. Krugman has a Nobel, but when he writes (at least for the last decade or two), he does so primarily as a propagandist, and secondarily (if at all) as an economist.

There's plenty of actual mainstream economists that can give you steelman responses to Austrian Economics. Don't go get them from Krugman. You won't get good steel from him; it will have too much straw in it.