I'm glad the map is enjoyable for you. As for whether to level up the second hero or not, I'll say this: you should level him up. If Kaspar is your main hero, it would be good to level up Adrian to at least level 30, while visiting all the places where you can increase stats. He will still be useful in the final. And in general, when the second act begins, it will be more convenient to clear the dungeon and complete quests with two main heroes.
The question here is that in the early stages of the game, he gets in the way of Kaspar, and when visiting the spider lair, the script only works for Kaspar, which is why I almost missed the spiders. And when you go to the elves, yes, he is needed; you can approach from two sides.
Added after 6 hours 10 minutes
Here's another wish. There are 8 death elementals. That's not enough. Give me 30 so I can enjoy them. Otherwise, I quickly lost them...