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Playing as the Necromancers is good because it's relatively easy to build a large army of weak skeletons/archers. Also, 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, especially 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 very slow. But otherwise, they are quite good.
Ghosts are good warriors, mainly due to the "Etherealness" ability, which allows enemy warriors to miss them. Otherwise, they are not particularly remarkable.
Vampires - always have them, as they are fast and have the retaliatory strike ability. They also drain energy from enemies.
Liches - their building is difficult to construct 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 Necromancers, because dragons are more expensive and do not reproduce in such large numbers. Death Knights can also guarantee the killing of 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.
