You want a fast, high firepower, and high shielded battleship???... Well yes I am here to help... There's a capital ship design called "Rosenriter" Is a fast battleship with all forward guns, 2 large hard points, 6 mediums,(all of them is energy and composite) , with the teleport ability that can teleport 5 times, very good flux capacity and dissipation, wit a passive that reload all missiles ammo including limited ammo, with a base speed of 81-90, and 120 or more if zero flux, very high maneuverability that it can match a the most maneuverable and smallest frigate in the game... This ship is literally have everything, mobility, firepower, defense. You can get all the ship blueprints (battleships, cruiser, and carriers) and it even have their own type of weapon and their missile weapon is OP, and it's really viable for you own personal fleet doctrine since other faction don't use them
And there's a ship called Nirvana class battleship from lostech engineering, a very rare ship that I found yesterday from derelicts, it has a high armor, high flux capacity and dissipation, high speed, lots of weapon firepower, resistance to EMP, really fast weapons repair, 50% faster flux venting, but the downside having a very teribble shield, but it doesn't matter, it has an active skill that fast your ship timeflow, increase all weapons fire rate that can shoot like a madman, and then teleport back safely to where the place of the ship before, (it's like a rewind time) and if you take a lot of damage, all of the damage you take and flux you used will be revert back to normal... Yeah literally this ship is OP, hell it can even kill 2 AI remnants big battleships at the same time if you use it correctly and his another passive that trigger if you take damage high enough your ship will be invincible for a second, and the armor that damaged is repaired, yeah really OP