Hey I don't want to waste my 500 post so let me tell you this:
Nidoking and nidoqueen are equally viable IMO. While Queen walls some fighting types, king take a more offensive approach and is able to beat stuff that queen can't with his scarf set (Mew, azelf, raikou Etc). I'm kinda thinking that you will disagree.
Sorry for being a bit confusing at times.