Auto-translated
Day 1: Gem collects chests and gold near the castle and heads towards the Dwarven Mine (along the way). In the upper castle, Enova is bought, Roland is placed under her. Enova collects chests and gold, but doesn't take the chest with 1500 gold or 1000 experience. She heads towards the Centaur dwelling. Roland is bought, Kir is placed under him. He takes a chest and levels up his advanced Diplomacy skill, then heads towards the Centaur camp, which is above the Mercury Mine and guarded by Monkeys. Kir runs along the path and stops near the Pegasus Stable (near the Sulfur Mine), with Pigeudram under him.
Day 2: Gem destroys the Dwarven Mine. Enova transfers her army to Roland. He connects the Centaur Camp, Silver Pegasi, and regular Pegasi. Kir takes the Silver Pegasi and runs along the path upwards. In the lower Rampart, Vey is bought, Dessa is placed under him. He collects resources and then leaves.
Day 3: Roland connects the Silver Pegasi and Phantoms, giving them all to Kir. Kir takes the central Necropolis. Dessa defeats the first Necromancer and occupies the upper right Necropolis. Vey, through a portal, captures the left one. Aeris finishes off the remaining heroes.
P.S. I didn't put too much effort into it; I learned about the Mercury and other things after I sent the save file.
P.P.S. Vbn, congratulations on first place; I think it's more fun to play with a hero whose total is 20.