I have fought with boots condoms too many times to recommend any , I believe a pair of "waterproof " boots is a better way to deal with downpour and even then what is sold as waterproof boots in motorcycle shops is not always waterproof I mean ok for the quick ride through shower but long steady rain is generally finding its way through..
personally after trying many and spending too many dollars , I ride now with construction boots with steel toes and steel cap. they look ugly but they ARE WATERPROOF and strong and keep my tootsies warm in all kind of rain all I modified was adding one set of eyelets and filed away the one to the far side
the good and the not so good