Auto-translated
Hmm...
If you've been playing on the "M" map for a long time in a 2 vs. 1 scenario, you can try these combinations: "Fortress" with the starting hero, Tazar or Bron, and "Stronghold" with a hero specializing in artillery or troops. You'll be able to build up relatively quickly, as these structures don't consume many resources, and you can also clear the map effectively.
And most importantly, try to attack him as early as possible by quickly building creatures of levels 4-6...
You can also try a Necropolis in combination with another castle, as long as the construction isn't too resource-intensive...
It's still best to try attacking him in the early stages, especially if you're playing without any specific rules, so attack him in the first or second week of the game, when he has almost nothing.