And where is the file of the final battle, at least? Or a slightly more detailed description of the battles? What tactics were used? As the winner, so to speak...
A Conflux is taken with the starting hero, probably a Lunar hero. Then, they immediately head to the artifact and improve the fairies along the way. After that, the monsters guarding the Angel Wings are killed with a wall of fire. By the way, if playing as the Red faction, the obstacles are very conveniently located for this. Then, using the artifact, they teleport to the AI's zone, to the stables. Next, the AI's Castle is captured, and the computer is defeated (most likely, a Necromancer or something similar with a slow starting army and no ranged units was chosen, which cannot offer any serious resistance on days 3-4 yet)...
How he dug up the Grail is a bit of a mystery to me (maybe he took a hero in the captured city from the computer)...
Even a single gray-colored Fairy can defeat a slow stack, but it will take a very long time, so there shouldn't be any problems with the computer at that point...