It's good to play as the Necromancer because it's quite easy to gather a large army of weak skeletons/archers. And even higher-level monsters are cheaper than their counterparts.
Skeletons/Archers - ordinary skeletons (by the way, why are they called bone warriors:confused: ) are weak on their own and can only compete with peasants. Archers are also not very strong, but in large numbers, they are useful. They are usually used both at the beginning and at the end of the game, if you have the "Raise Archers" skill.
Zombies are very durable monsters for their level. They are used in the early stages of the game mainly to protect archers. They are not needed at the end of the game because they are too slow. But otherwise, they are quite good.
Ghosts are good warriors, mainly due to the "Etherealness" skill, which allows enemy warriors to miss them. Otherwise, they are not particularly remarkable.
Vampires - always have them, because they are fast and have the retaliatory strike ability. They also drain energy from enemies.
Liches - their structure is difficult to build, mainly because of the need for a large amount of sulfur. They are good warriors with the poisonous cloud ability. An upgrade is desirable, but not necessary.
Undead - the main striking force of the Necromancer, because dragons are more expensive and do not reproduce in such large numbers. Death Knights can also guarantee to kill one unit (whether it's a peasant or a dragon). I always take them.
Bone/Ghost Dragons - not very strong units for their level. Undead still look more solid.

Archers are also not very strong, but in large numbers, they are useful. They are usually used both at the beginning and at the end of the game, if you have the "Raise Archers" skill.

Bone/Ghost Dragons - not very strong units for their level. Undead still look more solid.

Death Knights can also guarantee to kill one unit (whether it's a peasant or a dragon).

Why do Necromancers have better weapons and armor than the living? (For example, Titans walk around completely naked). Were they not buried at all... or were only zombies and skeletons (bone warriors) buried? I am a supporter of truth (or at least sensible logic). Let the armor be at least a little rusty, or well-worn (of course, not trampled or broken).