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I was thinking about how to gather more troops, but they defeated him in 10-11 days, which is unfair. Next time, make a tournament that lasts at least 4 months.
I did everything like the Ghost, including summoning and logistics, but it still wasn't enough. I mined the entire field, but the golem didn't care. He just ran and the spell was deflected. I managed to defeat him with this army:
15 Titans
32 Djinn Viziers
217 Steel Golems
461 Saboteur Gremlins
69 Battle Mages
15 Tier 2 Rajas
Plus 69 Fire Warriors, the entire field was covered in mines, and 1 Phoenix. The spell that helped me win was Raise Dead, because the golem just runs towards my Titans. I immediately resurrect the Rajas, and while he's busy fighting them, I mine the cursed field and attack him with archers.
The hero was Orac, because I still have undead from the wise hero.
Attack: 6
Defense: 6
Magic: 18
Knowledge: 22
And importantly, 220 mana/44 mercury and about 100,000 gold.
But in the few days that you played, it was brutal.