I meant, what should you do if the AI bought some scouts, upgraded them to become invisible, bought beasts, and immediately attacked you with two heroes, arriving on day 5 or 6, when you can only dream of good character development.
Where will it get two well-developed heroes with powerful magic, developed spellcasting, and a lot of troops for the second hero on day 5 or 6? Try playing – all of this also takes time...