Hmm, you are indeed right about the advantage carnages have against weapon batteries.
All I can say for the murder/hades config is that I find it much easier to always bring their weapons to bear when closing. In general, its easier to lock on, and get the maximum effect. All im saying is, murders definately dont suck. They are however, a ship that you should never take on its own, and a ship thats awesome in multiples. Theres a few of those in this game.