Heroes 4 is a good game. But it has many drawbacks: terrible AI, huge maps (it takes 5-10 days to complete one), and weak income in the castle (only 2000 per day - enough to hire 1/4 of a dragon).
1. Play against a human.
2. Play on smaller maps.
3. Play maps with gold mines.
I've created a game for you with no drawbacks! Hooray!

