(Hero - Rogue) in Heroes 4

The Rogue hero cannot initially be the main player.

Each case needs to be considered individually :)

Therefore, I would like to have time to fully upgrade his main skills, and not just something else. But if such an opportunity arises, I will most likely choose some magic. This will depend on which Castle I have.

Well, it depends on the map. And if the map is rich, then upgrading the Rogue and making him the main hero initially is not a problem. The problem is that in an online game, I personally would be wary of using a Rogue as the main hero.