I am trying to avoid locking down the specific weapons loadouts for the Vdan, for the reasons I will give below.
Before I explain, I feel it is necessary to explain what this ship is, and what it represents. A little back history..........
The Romulan Bird of Prey was one of the most sucessful vessels ever fielded by the Romulans for deep space patrol duties. By 2267 it was evident however that this dated design needed to be replaced, as it would not be a match for the Ktinga refits the Klingons were preparing to deploy in deep space, nor would it stand up to the latest planned refits of the Constitution class that would be fielded by the Federation. A new design was commisioned in 2267, and the plans for the Vdan were born. It would be a radical new BOP, with moving wings, higher crew and storage capacity and more powerful weaponry, including new plasma distruptor cannons attached to the ends of the wing assemblies.
As is typical for Romulan starship design cycles, manufacture was initiated in 2268, the same year that the Klingons and Romulans agreed to an alliiance. The Ktinga refits for the KDF would be fielded by 2271, so the Romulans had to move fast.
During the alliance, the plans for the vessel were aquired by the Klingons during an information exchange, a blunder the Romulans would live to regret.
The first Vdan was fielded in 2270 with little fanfare.........the ship was kept a tight secret by the Star Empire, and trials began quietly mid 2270.........with disasterous results. All 14 prototypes were lost when it was found that the pontoon style warp nacelles attached to the dorsal side of the wings caused inversion waves in the cores of the ships, causing the vessels singularity to grow in power until the ships collapsed in on themselves in spectacular fasion. The technology did not exist to correct this problem, and the project was abandoned in 2272 in favor of a much larger more stable Warbird design, in it's early conception stages.
But the Klingons had other plans.
The Klingon Empire recognized the extreme flexibility of the Romulan design, and fielded their own version with exposed warp coils instead of the attached nacelles. Not only did this improve on the reliability of the design and the cloak dynamics, it proved to be a perfect match for the monolithium cores utilized by the KDF. The shape created the most powerful cloak field ever seen in any Klingon ship, and the "Brel" class BOP surpassed the Ktinga refit as the most fielded Klingon ship in history.
But the Romulans would prove to learn from thier mistakes.
In 2368 the Vdan design was revisited. The Brel design had almost 100 years of reliable service in the KDF, and this could not be ignored. New technologies allowed improvements to the original, and espionage provided the missing pieces to the puzzle to create the ultimate BOP design. The Vdan was reborn in 2370, much to the suprise of the Klingons and Humans.
Units were first outfitted with the Vdan in 2371, and the ship surpassed expectations. Work soon began on larger, more flexible as well as dedicated versions for a variety of roles in the same year, and the first Dvethex and DDmad fired up it's core the following year. Plans for an even larger version, the VVorath, began in 2373, but was interrupted with the advent of the war with the Dominion. The Romulan BOP was once again thrust into full combat, and performed flawlessly and with distinction in many of the major battles of the war.
Many improvements have been made to the series over the years, and the Vdan series BOP has proved to be the most versatile BOP ever fielded by the Romulan Star Empire. The Vdan and it's counterparts remain in service today.
.........Ok, why did I give this rather lengthy background story to you? Well, part of it is because I like the connection I made between the Romulans and the Klingon BOP. STTSFP originally had Kruge stealing a Romulan ship, but the reference was dropped in the final script, though the obvious Romulan design and name was kept. Hence the paradox was born.......a Klingon BOP. It looks Romulan folks, and it has the Romulan wings, red feathers, and even the name. BUT IT IS KLINGON.........take my word for it, seriously. *sigh*
Anyway, I decided to make the connection and design what I believed a Romulan BOP would look like. Naturally the ship would look alot like the Klingon ship, because the Klingon ship was originally the Romulan design. I had to make the ship look decidedly Romulan however, so this is what I came up with.
Finally coming to the end of this lenghy post...............The ships would have a standard loadout that matches what you see, and would also be very similar to the Klingon BOP in hull strength, speed, power output, etc. This ship is faster and more nimble, as it is a newer design, but basically it is just a Brel with faster engine and Romulan weapons.
Now, knowing the full story of the ship, you can envision what you believe this ship would have based on when it was designed and the refits. The ship you are working on was manufactured in 2383, just before the Breen war begins in the Infinty storyline. This ship is Future Trek, but should not be a supership.
If you need more than this rather lengthy post, let me know. But fear the reply