I think these ships should be same as zoner colonyship or little bigger, Huge armor but very slow turn speed
Atleast 3 or 4 Broadside weapon with 2k projectile speed so it will have chance to hit ships if they get in-sight of the weapons
Long range and Short Range type of Weapon maybe with 30-45 degree weapon arc with like 1-3 Turn Speed
Short range should have high dps low damage and Long range should do more damage but low dps
maybe around 8-12 Defence Turrets
They should move slower than battleships but should able to cover its position without worrying about range
and i think these ships should be Vertical, it would be great.