Stronghold – “The Barbarian Seven” [Campaign 6, Mission 3]

Should Necromancers be attacked? Also, all buildings that increase unit growth have been built. There is a dynasty trait that increases the growth of skilled creatures by 1, but the growth of Cyclops is 2 weeks – is this a bug?

Added 22 minutes later
Regarding the Necromancers, it seems they cannot be approached.