Hi! Actually, no one plays at levels below the hero anymore)).
The Necropolis is very strong in the early game because the main damage is dealt by the hero, and the army just needs to hold out for as long as possible. Therefore, when rushing, starting from week 2, upgraded Hydras with regeneration are actively used; they stand in defense and recover through the "wait" button.
There are several strategies for playing as the Necropolis, as there are for other factions. Previously, you could watch many streams and examples of builds, but now I only know that Noom streams:
http://www.twitch.tv/noom11/profile
You can also read about many successful Warlock games in tournament reports:
/forum/section/152/
By the way, registration for a new tournament is currently open. What could be better than practice?))
/topic/11109/