Haven discussion.

Haven struggles against Necropolis, just like most factions that rely on brute force. The only exception might be Fortress, but it's still a Rune-based faction, so it's more of a Mage faction. Necropolis should be countered with Dungeon or Academy.

Knights struggle against a skilled Necromancer who doesn't drag out the game too much. A Peasant-ZOMBIE gives the Knight the opportunity to train for 3 months and be ready to crush him with Necromancers at the beginning of the fourth month. This is where I (and perhaps not just me) have certain doubts about the success of this method.