[QUESTIONS and ANSWERS] Walkthroughs for the Heroes 3: RoE, AB, and SoD campaigns.

Thank you for the advice. To be honest, I expected more, since here are experts of the game who have been playing for a long time. I specifically want 13 attack and 3 knowledge.

Experienced players don't waste time completing all quests unnecessarily. It's much more interesting to achieve the victory condition in a shorter time, not in 7 months, but in 7 days, for example. Don't you agree?

Not a single hero retreated from the battlefield. And as far as I know, if heroes retreat, their subsequent re-acquisition in the tavern happens with a full set of artifacts and the remnants of the army. Isn't that right?

Yes, but the computer might not have bought him, and next week he will simply disappear. But judging by the fact that the difficulty level is "peon," the computers don't retreat there.

Gentlemen experts, if possible, share your thoughts on where the 2 coveted artifacts are and why I didn't get anything for 12 griffins.

Perhaps these artifacts had to be found in the previous scenario and would carry over... In general, you need to extract the map from the campaign and view it in the editor. I'm too lazy to do this, and I wouldn't advise you to either, because it's not critical for this map. :)
As for the 12 griffins, I can assume that the quest only has a task set, but there is no reward for them - a flaw of the authors.