The key thing is scaling up every level of missile production. The US navy barely has enough missiles to fill every launch cell in the fleet, and the annual build rate is very slow since they have to worry about things like “profit” instead of “winning”.

As long as you fill can produce missiles and fill missile cells - you win. The ships themselves can be civilian-produced, have no defenses, no safety features, and abandoned the first time they are hit without worrying about damage control. You don’t even need radars, since an actual real warship or command aircraft with a highpowered radar can data-link and aim the missiles for you. This would also give them very high availability since a civilian ship with no fancy features that just hauls missiles that can be borrowed by warships in the battlespace would be extremely cheap to maintain. A chinese warship locking onto an enemy warship and finding they have 200 missile cells in range to call from along with the 60 or so they have on board is going to win.