Secondary skills in Heroes 3.

I personally don't understand how you can divide hero skills... one will have wisdom and intellect, earth, water, air, or good warrior skills, and another will run behind with scouting, erudition, artillery, first aid, etc. It's a pity to even give such an army away... he won't influence it and won't even enhance it with magic... IMHO.

There are different goals in the game.

Here, look at one of the standard schemes for working with secondary heroes: there are eight heroes on the map - all are busy, and you can't fire anyone. Let's say it's the third week of the game. You urgently need to give one of the main heroes the "Forgetfulness" spell (for example), which is simply necessary for the planned battle...

To do this, we drive any of the active heroes into the "pocket" of the city (otherwise, we won't be able to hire anyone), hire a hero with erudition, level up his advanced erudition, send him to the city where this skill is available, run away from the nearest obstacle, hire in the city that is close to our target hero, catch up with him, and teach him... And all this, if possible, in one day without losing movement points for the main hero.

We fire the erudition hero (if there is no opportunity to put him in the "pocket" on the same turn). We can move on...

This is what we are talking about when we talk about secondary heroes. The main hero doesn't need erudition, but a hero with erudition can be very helpful and, having done a good deed, he is free. A one-time use of a secondary hero, which can determine the outcome of the game. You probably send the main hero to the Castle to learn magic? :) That means you just have too much time... :)

Added 5 minutes later

but the Conqueror really needs essential skills - earth, wisdom, attack, etc., and I don't even level up the others much... they just run around, carry the army, and collect resources, conquer mines, and most of the battles often take place with one hero... so why should they know other skills, as it used to be said, "so that all skills are used"? I don't quite understand this... maybe it's because I'm not such a pro in the game?

Play for speed... Most of the advice and comments here are precisely from the point of view of "how to do it faster"... It is clear that you can, in principle, complete any map with one hero - sooner or later... But the effectiveness of the game depends on the ability to use all the tools available to the player.