Aurellia you said
Aurellia You could destroy that ship for the same budget with only one weapon.
Well, I dare you to try. Really, i do.
Your ship looks breathtaking. It's beautiful. But check this:
This is Triple Exodia, another of @Teg's designs, which costs under a third than yours ERN Celestia.
I put them two together just to show you how designing the ship is trickier than it might look.
Again, it costs less than a third than Celestia. But if i focus maneuvering to keep at one side (really get into your turning radius, which is easy since it's so long) i can get somewhere relatively safe, since Triple Exodia has some very good shielding, and just "eat away" through your ship. as your missiles gets shot mid-flight and your bullets have little to no effect on those shields.
After severing crew mobility to the front part of the ship (if there was any, but just in case) i focus on (literally) digging through the ship to get to the most dangerous weapons, the Ion Blasters, but completely safe from it, since i'm inside your turning radius. If any of my shields gets too damaged, to the point of almost giving out, i just rotate my ship once. That gives more than enough time for the shield to rest.
whoops.... that's a problem.
Well... i'll deal with you later.
Bye bye, for now, most dangerous part of the ship.
Steady "corrosion" of your ship from now on, now that it is severed and the "head" has no forward nor backward thrusters, so it'll take some time to come back. Target weapons first, i forgot. lost a corner there, but no biggie, i just have to keep spinning.
Disable all your weapons, steadily. Oh, well, look who's back
No problem, just move out of reach.
Then steadily eat away at it, circling around it.
If i really had spent the time rotating shields and targeting all the right parts Triple Exodia would come out mostly unscathed, but i'm lazy and don't want to bother with the controls that much. And it costs less than a third than the oponent ship, so... I don't think it could take two Triple Exodia, one from each side.
My point is. Your ship is pretty, it's beautiful. Exodia or Triple Exodia isn't really pretty to look at, but the damage it does is much higher, much cheaper, thus it is much more efficient, and its only weakness is its corners, because they aren't really as well defended as the rest of the ship, and once that's gone it creates a pretty big opening. But if you rotate to give time for the shields to recover that can be easily overcome. Celestia doesn't have enough concentrated firepower to deal with those shields anyway. It's Missiles are very dangerous, though. Triple Exodia almost doesn't have enough point defense to deal with them. But they are really only dangerous at the first salvo. after that they shoot too sporadically to even be bothered with, the shields alone can hold them.
In short. Celestia is pretty, it works nicely. But not good enough against ships with implemented tactics, it has only brute raw power, and wins against most battleships simply because it's bigger, not because it's better.