So since we got rid of the Overlord in our Flawed ships document, I don't think it competes so well with the Ignus I built. However the Avenger does, but it doesn't have 6+ prow armor, and has to buy speed/torps....
I could see going as high as 14 on the sides of the Ignus, as it says in the fluff that it was a failed attempt to improve the weapons/speed of the vessel.