The task is quite easy to complete. It’s a puzzle about logical movement on the map. Although, those who enjoy it can simply crush everyone without discrimination.
I have a small question for you. Did you reach the Silanna tree, or did you choose the level limit for both heroes? (What difficulty level are you playing on?)

Please explain to this unrefined grinder and lover of crushing – how to logically move your Castle away from the advancing dwarves? :) The task says to avoid confrontations. Does this mean that you simply have to give up the Castle to the dwarves? And if they capture it all? That’s why I initially wrote about suggesting that the task be adjusted. But if everyone else is doing fine, I withdraw my suggestion. Sorry for all the unnecessary text.
I did reach the tree.
I initially trained Varenik by instinct. And then I focused on Andreyka. That’s when the tree came in handy for him. If I had a soothsayer, I would have sent Andreyka, naked and without an army, to the bearded dwarves. ))) Development is going well on this map. There are many battles with strong neutrals. And the battles with the priests quickly raised their level. Both heroes are level 28. "Education" for both played a significant role in their development. I’m playing on "Warrior". I think that’s right. I probably wouldn’t have been able to handle the priests on Veteran.

Added after 1 hour 34 minutes
After completing the third mission, I understood the author’s intention :) and I withdraw my suggestion about transferring artifacts from the second to the third mission.
Dear author, the game is very addictive – that’s bad, I’ll definitely oversleep my morning meeting)))