Auto-translated
Voted for Liches.
Although they are not the primary damage dealers in a Necromancer's army, experience shows that by the time you accumulate 50 Liches, you will already have 1000-1500 skeletal archers, which are much more effective and can be further protected by zombies. Liches can only be effectively used with a specific tactic, and even then, it's not as effective, and my PC doesn't like them.
But the poll isn't about that. Of course, Liches will defeat everyone, unlike in PvP against Nightmares, which can put up some resistance. But it all depends on the situation.