CursedPh4nt0m I would think the scale would go like this.
You would have a venn diagram with three circles (Defenses, Propulsion, Weaponry) , and each circle would go in like normal. At the Propulsion and Defenses would be something like armored transports, or something similar. Defenses and armor would be Like Dreadnoughts and Oribital Fortresses (using the term from the triangle, could also be space stations) and for the other corner would be suicide vessels, missiles, interceptors. A healthy mix would also be cruisers, but could also be destroyers. While not as specfic as the triangle, it also allows some leeway for what could be considered.