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Here's a gold tournament, but for some reason, no one seemed eager to capture Castles as quickly as possible; that's very strange, and no one even considered capturing the Red Castle.
For some reason, no one used Mentorship, even though it was the easiest way. You level up Delleb by killing everyone in the Castle, from the Shipyard to the Phoenixes and back. This gets you to level 22. You can organize all of this by the beginning of week 3, meaning on the 1st day of week 3, you can start attacking the Phoenixes. Delleb, with the Book of Dark Magic, could level up 5 heroes, who would gain levels in Summoning and Fire Elementals, plus Luck-Luck on the road, and then go all over the opponent's map. Delleb would go to take out the Mages and then the Necromancers using Phoenixes and Titans (120 of them), while one hero with the Book of Summoning would go to Utopia. And it's all simple; all resources are gathered with Luck on the road, and all Castles are captured.
You might ask why I didn't use this tactic; it was weak for me because if my tactic had worked, I would have defeated the Phoenixes at the beginning of the second week, but the tactic didn't work, and I defeated them on the 10th day.
As for the maximum score, if you really try, you can get 450,000 without selling any artifacts.