Under my Kamleika trousers I was wearing 2XU tights and Helly Hanson long johns. Perhaps I am asking too much of running kit in such conditions - but then my Shakedry top worked well for my top half, so it is possible for lightweight kit to keep the wearer warm and dry, at least for a while, despite rubbish weather.
I was under the impression that OMM had some eVent pants but it would seem they don't, so the Kamleikas are their "top" pants.