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Yrbeth gets +1 knowledge because the Dark Ritual ability is really weak. Also, Knowledge itself is a very passive bonus, so it is usually given with other minor bonuses like bonus Experience or Dark Ritual.
Other bonuses like attack, defense, and spellpower are okay compared to other specializations because they give a flat bonus towards all creatures or all spells.
It may seem weak if you compare the bonus number from a primary skill specialization to a bonus from other types of specializations, for example:
Bonus attack - at level 30, a hero will get a bonus of 4 attack, which is about a 13.32% damage increase for the whole army.
Bonus to creature stats - at level 30, a hero will grant 15 attack and 15 defense to a specific stack, which is a 49.95% damage and 49.95% defense boost, but this is only for 1 type of creature and can be easily countered in the following ways:
- Focus fire the creature so it dies faster and thus renders the specialization useless.
- Blind the creature so it is useless.
- Puppet Master - turns the specialization against the enemy.
- Destruction gives a lot of ways to destroy or weaken single stacks as well.
- With summoning, one can send a phoenix or block the creature if it is not a flyer.
Primary defense bonus can be justified the same way as primary offense.
Primary spellpower bonus compared to a single spell specialization bonus is more or less the same, but here we talk about spells:
Bonus spellpower - at level 30, a hero will have a +4 spellpower bonus for all spells.
Bonus single spell - for example, Swarm Queen gets a 5% damage bonus for the Wasp Swarm spell per level. At level 30, this is a 150% bonus, which is a lot! But it can be countered in many ways, such as:
- Useless vs. Undead.
- Useless vs. Spellwringles.
- The enemy will always have a Ring of Banishment because it is a minor artifact, and a player can find it a couple of times even on a medium map.
- By picking such a hero, your strategy is defined since the beginning, so the enemy will most certainly pick a hero that can get "Shatter Summoning."
The idea is that each hero can counter and can be countered by an opponent's mix of Hero type (might, balance, magic), specialization, and artifacts.
Some general thoughts - I would very much appreciate adding more heroes with unique specializations as in NHF, but it is not possible because the EXE we are using is version 3.0, where the NHF utilizes version 3.1. There are some major differences in what scripting allows between both versions, so some of the NHF specializations are not possible to make.
Added after 3 hours 33 minutes
P.S.
In a single paragraph, specializations are 2 types - broad and narrow.
- Broad are weaker but constantly applied and hard to counter.
- Narrow are stronger; they are applied under certain conditions but are easier for the enemy hero to divert.