Sir Syddan, thank you for the Walkthrough!

1) During Christopher's first attack, he was supposed to drop the Ring of Kinship with the machines (?). There was some kind of message, but the new level window covered it. The hero's inventory also didn't have the ring. In short, it's strange...

The message that appeared before the window said that the ring was supposedly added to the player's inventory. But it shouldn't be added (because the enemy with it is reusable). This is a feature that I implemented due to the specifics of the game mechanics. There is a note about this in the "Changelog" section, even in v0.1.

2) If you subdue the forest archers and, by shooting at the enemy, inflict a crippling wound, the game simply crashes. Because of this, I had to go into the mod files during the battle with Faydaen.

It's more likely that the ability itself bugged out in the game. I didn't modify it additionally. Perhaps the same thing happens with the dwarven spearmen. Thank you for identifying this; I will think about a possible replacement.