1) There is a ring that counters Holy Word, but it will still be inferior to the Necromancer's Unholy Word;
2) General Banish can also be cast, meaning one turn of your hero is wasted;
3) As I said, Exorcism does not remove ALL negative spells at once (although I am not entirely sure about this):
4) The Rune of Etherealness is useless; it only guarantees one missed attack. Besides, don't forget that Naadir has a LOT of ghosts that solve this problem:
5) Berserk is good, but you need to find it;
6) Resurrection is good to use, but only low-level creatures are well-restored;
7) In short, let's play through Hamachi and see... 2 turns of your hero won't be enough to even finish off the skeletons. Don't forget that the terrain can be against you.

1. You still need to find the ring! Unholy Word will work on at most 35% of my units; you forgot about the Dwarven Luck and magic resistance!
2. On the contrary, I save one turn by casting Haste and Banish simultaneously!
3. This rune removes all negative effects applied to the unit!
4. The Rune of Etherealness doesn't work for just one missed attack; it works for the period from its application until the unit's next turn, which can result in many missed attacks! Ghosts (the most dangerous units in the Necromancer's army) will reach you on the third turn with Storm Wind!
5. The Rune of Berserk is always available, even for a moderately skilled Dwarf player, because it is a level 1 rune, just like the Rune of Speed, and this problem is completely solved by taking Ingvar, which almost every Dwarf player knows!
6. Nonsense, quite the opposite. Imagine that somehow you managed to defeat 15 dragons! With Battlefield Promotion, I cast the Rune of Resurrection and get +7 dragons (40%), and if you are realistic, you understand that this is a serious problem for you!
7. I'm not looking for easy ways!
Of course, I already see the need to play; it's just that I don't think you'll believe me otherwise!