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Yes, the map is simple and doesn't encourage large-scale battles.
9 days is an achievable result with the most straightforward approach.
On day 2, 5 heroes defeat the cyclops, run to the knight, and then split up – 1 against the Necropolis, 4 against the Barbarian. I didn't even capture the vampire's lair. It was obvious that the map could be completed in 7-8 days, but I lacked the time and skill to do so.
Congratulations to the winners!
P.S. I still would like to watch the replays. Iron, how are you?