Haven vs. Fortress (how to play against dwarves?!)

Let's assume the difference between the defense of shooters and the attack of cavalry is 20 points.
The damage of 60 Isabel's knights is approximately 25*60=1500, and another *2, since the difference is 20, that is, 3000. About 200 spearman will die (I don't remember their hit points), and this doesn't take into account the spread. And if Axel is also present, my experience shows that the unit usually doesn't survive.
In any case, this is a good alternative to dwarven runes; I don't see any imbalance. Besides, dwarves have a very difficult start and city development. Well, maybe the resurrection rune combined with fighting to the last is a bit too much.

Added 8 minutes ago
I don't know, if the bears rush in on the first turn and attack the cavalry, they will probably die from the counterattack. Honestly, I haven't played in a while; it seems that the probability of fear or a claw attack depends on the soldiers' luck and the number of creatures in the enemy unit. And the number of cavalry is very large. Therefore, the cavalry can still gain momentum.
Besides, there is a chance to get teleport, as a guarantee that the cavalry won't be disabled during the battle.
You can also consider splitting the cavalry into 2 units (there will be no inquisitors left).

Nuance: regarding the spread, there may be obstacles on the territory where the battle can take place. And the difference in attack and defense, due to the skill (+1 and +1 for each level), let's say that both heroes will have the same defense and attack, which will be extremely small, only 6 units. And by the way, dwarves usually also apply armor to everyone, which is another +9 defense. And when properly positioning troops, you need to take into account the dwarves' healing. So, 200 spearman will definitely not be killed. And the cavalry can simply be blocked with a crystal. And regarding the slower development of dwarves, hmm... yes, there is such an effect, but only for large maps and the second-to-last difficulty level of creatures (patch 3.1). You can only reach the enemy's territory by the time the enemy has developed, and this is taking into account that the troops standing between the territories can be bypassed with astral gates. And regarding development, with proper leadership, you can play as dwarves without falling behind in development. And another point, let's say we got cavalry, attacked with it, and killed 200 spearman, but we won't have inquisitors, because we made cavalry, and the enemy has all levels of troops. By the way, there may be more spearman, because every week another hero with troops is bought, so there are already 700-800 dwarves with 450 spearman. The cavalry attacks with the etherealness rune on the first strike. The cavalry wastes the attack (well, with good luck, they will hit, but the rest of the cavalry will simply be cut down). Yes, about luck, in such battles, luck is usually very high for both opponents, around 6-7 (of course, in the game it is perceived as 50%, but honestly, this is not a small number, and I don't understand those who underestimate luck; if this number is large, and combined with soldiers' luck, this allows you to win the battle very well, even morale is not so effective). So, it is doubtful that you will succeed with your cavalry. And just for fun, you can play with us. And another nuance, about the balance of the game, even if it turns out that your tactic is really correct, it means that only a knight can counter the dwarves? This is not balanced. And for some reason, I think that you might even lose to necromancers with knights, simply because you won't have anyone else. And in my case, I had 200 vampires with characteristics (+1 attack and +1 defense for each hero level, i.e., +15 and +15). Thanks to the runes, I halved all their units in one turn. And this is even taking into account that the liches were also halved.