Ghost Fleet is a Cryx theme list that debuted last year, was unlocked sometime over the winter, and has been tearing up the meta at a very high level this spring and summer. It's strong into a lot of matchups, and plays a pretty different game from many lists, which means you have to have a specific plan for dealing with it. That means both having a list that can handle Ghost Fleet, and a strategy for winning against Ghost Fleet with that list.
I realise that this post is a little behind the times, since Ghost Fleet has been a powerhouse for a while, but these kinds of thought experiments are fun for me, and maybe Skorne doesn't have a lot of information out there yet (I don't follow the FB group or LormaHordes very much). Anyway, here's my take: