Two new types of specializations are weaker than the old ones (some old specializations are also weak, but some were strong). For example: the Archilicus hero at level thirty gives three Dark Mages (Liches) per week, by which time he will have 70 Liches. The Tkodor hero gets +4 to witchcraft at level thirty, which is not enough for me. Sorry if it's not clear; I used Google Translate.

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Two new types of specializations are weaker than the old ones (some old specializations are also weak, but some were strong). For example: the Archilicus hero at level thirty gives three Dark Mages (Liches) per week, by which time he will have 70 Liches. The Tkodor hero gets +4 to witchcraft at level thirty, which is not enough for me.

Thank you; now I understand.

The Archilicus specialization at level 30 indeed gives 3 Liches per week. Keep in mind that this is also per castle. So, if you have 2 castles, that's 6 more Liches per week.

The basic Lich growth is 3. Castle building makes it 6. So, at level 30, you have 9 Liches per week per castle.

A player can easily reach level 10 by week 2. This means that in the first population week, the player can get Liches; they will get 1 more for certain. This makes 3 + +1 (citadel) + 1 (specialization) = 5.

This is 25% more Liches now.

At level 20 + castle building, a player will get 8 instead of 6 (33% more).

At level 30 + castle building, a player will get 50% more Liches.

Considering that the Necro army doesn't die, this means you will have significantly more Liches than expected at the time of the battle.

Tkodor's witchcraft bonus is not so big because it relates to all schools/all spells. Narrow magic specializations are more potent but are easy to counter because the enemy knows your strategy from the very beginning.

The same philosophy applies to other broad specializations as well.
"Blood drinker" - The hero gets +1 attack on each killed enemy troop. He gets another +1 for every 9 levels. This means that at level 30, he will get +3 attack per killed troop. The attack bonus is also nerfed to 3.33% instead of 5%.

So, at level 30, you get almost no bonuses before some of your and/or enemy troops start falling.

Imagine that you have Player A vs. Player B.

Player A gets a hero with the Wasp Queen specialization - "Wasp swarm deals 7.5% more damage per hero level."

Player B picks a Might or balanced hero with Shatter Summoning or develops another hero with the Spellwringer specialization: "Hero has a chance to permanently block enemy spell from the spellbook for the rest of the battle."