can you post the mantirostris? i think i also saw that design in one of your post. was it this one? (i've been testing out the ship designs i see in this forum, while i wait for pvp multiplayer)
i put my ship (KathleenTurnerOverdrive) in AI mode and i piloted that mantaray ship, coz the only way i was able to catch KTO was when i ambushed it while it was doing a turn. but on a frontal assault, i couldn't seem to catch it.
either that, or i had to focus fire mantaray missiles on one module at a time, while keeping KTO unfocused fire. (coz focus fire with KTO is deadly, as long as it stays out of cannon/beam range coz it has zero defenses other than PD. it can even outrun cannon fire shot at it, as long as it wasn't shot at almost point blank range)
anyways, i tried doing this design after that battle.
it's a bit slower, but since i put in 2 more control rooms, this ship actually splits into three separate ships when damaged.