and why did you feel the need to explain all this in response to my "artifacts shouldn't be taken into account" – you're talking about something completely different here, and I didn't say that the Necromancer has weak Specialization.
1.
any Specialization is simply useless against the combination of magic schools and "defense"/"attack" if there is an opportunity to use them (depends on the enemy race)
And according to you, is true luck and absolute defense a weak skill??? – ideally, the values of Specialization should be somehow balanced.
In my opinion, the Necromancer is leveled up through "defense" and "light"/"darkness" buffs/debuffs, which allows him to clear most of the map, including level 7 locations, through 1 slot of Vampires (due to their size) (of course, I'm talking about maps with a normal difficulty level on a "hero").
And by leveling up through mentoring, you can increase Dark Energy by 3 times :)
So, Specialization doesn't work for the Necromancer.