How so? With the method you suggested above?
P.S. When will the next official tournament be? At least approximately.
We do it like this.
We develop Delleb, clearing everyone on his territory by going in a circle around his Castle, without picking up chests. Orson levels up on the chests; at level 11, Orson gets Fire Elementals.
On day 6, we attack the Angels at the exit. Orson goes to the Phoenixes with ghosts (at least 7), killing everyone in his path, with one hero following him. Delleb first goes to the Wood Castle, and then follows Orson.
On day 14, Orson defeats the Phoenixes with the help of raising the dead and Fire Elementals; Orson is around level 15-18. After defeating the Phoenixes, Orson runs to the Green Castle (Mages), without attacking anyone. Delleb defeats everyone, collecting trophies and the Book of Summoning, which is given after defeating the Phoenixes. On day 2.5, Delleb takes the Blue Castle, and on day 2.6, Orson takes the Green Castle. Then, Orson defeats everyone and runs to the Red Castle, not missing a single creature, and continues this way until he reaches the Phoenixes. The main thing is for Orson to reach the Necromancer's Castle on day 4.1, while leaving one Necromancer hero running around the map so that the victory is not automatic.
By the way, we only upgrade our Castle to level 10. The Green opponent already has a Capitol built, so it's better to save money.
After defeating everyone up to the middle, Delleb turns to the Shipyard, defeating everyone in his path.
Nibros, level 5 (with luck on the road), collects all the resources near the Castle and then continues on his territory to the Shipyard.
On day 4.1, we take the Necromancer's Castle, meaning all Castles have been captured.
And Delleb takes both Utopias with the help of a ballista and the Book of Summoning.
Now let's calculate. My result is 358,000. We saved on upgrading the Castle and other buildings +20,000. We earned 6,000 more from the Blue Castle, 6,000 more from the Green Castle, and 10,000 more from the Red Castle, which totals 358 + 42,000. Then, we get about 10-20,000 from the trophies and 10-15,000 more from luck on the road, and 5-10,000 from the resources and gold from the previously captured mines.
The total is 425-445,000.