The enemies that spawn while with the Infinite Archive are randomised with each stage. However, a selection from 1-2 "Factions" will be spawned by the maligraphies for each non-boss stage. Some of the creatures that spawn are independent of any factions, such as the Dremora and Fabled enemies. The latter appear more frequently in later arcs and are more powerful than most.
Please note, most of these listed factions correspond to the categories mentioned for the Archive's Most Adored achievement.
†Elite Enemy
±Start appearing after Arc 1, Cycle 4, count towards Fabled Foil achievement