Glory Angels where the backbone of the Nivelian Starforce.
They are massive warships, dwarfing even the Extinct Class. Infact they are known to have there own gravitatonal field due to mass alone, although this makes them obvously intimidating, this size presents some major issues.
They cannot be used within a star system as there massive size would cause orbits to be screwed up, and thus Glory Angels must be assembled inDeep Space.
It also makes it that everything that has a chance of being near one of these ships has to have precuations to prevent being happered by the gravity of the starship.