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Generally, I would like to replace the artifacts behind the key with rarer ones. Sandro's Cloak and the Staff, for example, would be a good option! Otherwise, there is no point in looking for tents.
Although the idea of capturing them was good. The Gameplay will become much more interesting. And prohibit their appearance in cities and wagons.
It would also be nice to give badges for completing the Walkthrough! And the map would become epic. Once, I managed to defeat everyone in 3-4 days (veteran).
True, with the NHF mod for the Elven faction (enchanted ballista), it helped even with a small army; I was lucky that it appeared almost immediately!
And the ring for the machines is always located near this city, and the library is also there (as I described above in my strategy for choosing). And normally, it was not possible to complete the map faster than 4 months!
I liked the location of the creature recruitment buildings and prisons with level 5 heroes and their troops in the right places in front of the cities! This helped a lot in quickly capturing and developing a strategy. Sometimes, the Knights' deadly strike or the Phoenixes helped to avoid losing a campaign.
Thank you for the interesting map and the effort! I will try again. For example, with the Dwarves for the purple player (brown), I made a mistake above))).
Spoiler! The most useful Artifact on this map is still the "Shackles." It should definitely be behind the key; it makes life and chases much easier.