The Mirror Assault Cruiser is one of the very few really cool ships in this game. A Big Cruiser that is actually capable of generating at least a bit Firepower AND does actually look good IMHO. Whoever had the idea of this must have been a genius.
Yes i do myself use the Nomad Nacelles all the time, they give the ship a certain hod rod look imo.
But i must say i bought the Nomad some years ago when Cryptics actually was releasing additional ship parts without any gadgets, like 5 Weapon slots or consoles. Can you imagine that! So i don't know if that works with the Fleet ship parts.
"...'With the first link, the chain is forged. The first speech censured...the first thought forbidden...the first freedom denied--chains us all irrevocably.' ... The first time any man's freedom is trodden on, we're all damaged. I fear that today--"
- Picard, quoting Judge Aaron Satie
That's actually incorrect.
The Mirror Assault Cruiser uses the standard Star Cruiser parts, any parts you unlock for the star cruiser, including the mirror universe material will work on all other parts, including the unique set of parts you gain for obtaining the Fleet Star Cruiser.
So, yes, you can get your Nomad class with the mirror universe material, provided you have both the Mirror Universe Assault Cruiser & Fleet Star Cruiser unlocked on the same character.
It's the True Way. My Eng/Cruiser Captain flies the ISS Imperious (Mirror Assult Cruiser) using the Nomad Star Cruiser skin and the Mirror Universe skin. I get a asked where I got the ship about oce per week.
Now if I could use my Mirror Universe Assault skil on a Reliant Class ship, I would be in heaven.