The Borg in Fleet Operations Mod for Armada II are the most uber as it can get. If you have free tech enabled, and enough space to build and plenty of construction ships, you can mass produce ships faster than any other race. But please note, don't limit your Uber Borg Fleet to just Cubes . The Sphere and the Diamond have their uses aswell. A well mixed fleet of Assimilators, Diamonds, Spheres, and Scout Cubes can to a great deal of damage.
Upon building a vessel from the Assembly structure, and after you select a ship you want to construct, a menu will come up, displaying the components you are able to pt onto the Borg ships. You can use these in any combination, which allows the freedom of attack methods, as well as using each ship for a special purpose.
The Borg can be complicated to use in massive assaults. The sheer size, and the texture level of the ships will lag your computer, aswell as take up most of your screen. If you have a fleet of just Cubes, it is hard to get them selected as a fleet. And if you have a full fleet of Borg ships, their size limits their mobility and in some cases, it takes a good bit for them to move because they cant get around asteroid fields and nebulas because other ships are in the way.
Here are some helpful tips on the Bord for Fleet Ops.