Xaker
That's just the thing: an experienced player spends 70% of the game in uneven battles. For the first two weeks, especially the first one, you have to claw out victories practically by your fingernails. And only during the remaining 7 days do leveled-up heroes clear the territory with brute force.
Take Chaos, for example: during the first week, I have a maximum of 40 thieves and 20 orcs + a maximum of two heroes. In such a situation, fighting against shooters is unrealistic—the orcs just stand there, and all you can do is use Magic Arrow (if available) and attack with a dozen thieves.
In melee: the thieves are one-time fodder for the first strike. Only the orcs and heroes can save the day (and if you hide the thieves, you can even do it without losses)...