Auto-translated
Let me elaborate on the units. More precisely, I'll share my perspective on what Necropolis and its units represent.
Skeleton Warriors are among the weakest Tier 1 units. Only peasants and goblins are worse. They are only capable of covering their own flanks. Archers are generally useless and are only used in specific situations for breaking through enemy lines. 1/5.
Zombies are a good unit, especially with their upgrades. Many underestimate them, leaving them for later, and ultimately lose. 3/5.
Spectres are another weak unit of Necropolis. Some say they are good because they are incorporeal, but in reality, they are weak attackers. However, they have one advantage: they perform well when breaking through enemy lines and actively hinder archers. A deserved 2/5.
Vampires are the strength of Necropolis. One of the best, if not the very best, unit in the game. The entire Necropolis strategy is based on them. Vampires handle breaking through enemy lines and final battles. 5/5.
Liches are good ranged attackers, but they occupy 4 squares and without cover, they are a pitiful sight. Greater Liches are simply essential for breaking through enemy lines. 4/5.
Undead are another disgrace to Necropolis. Their attack is among the worst at their level, and on top of that, they cost a lot of gold and dark energy. Although Harbingers can remove antimagic, killing a single monster in a squad is a depressing sight. Banshees can use their ability, which makes them better than Harbingers, but if the opponent has leadership and artifacts that boost defense... it's depressing, to put it mildly. 2/5.
Bone Dragons are also often underestimated. Despite their modest stats, they are among my favorites due to their increased growth and good price. In my opinion, Astral Dragons are better than Phantom Dragons because you can obtain a general debuff through a skill, while grief is more useful. 4/5
So, let's summarize. Necropolis has an average score of 3 out of 5. They are just average.