Heroes 6 - Discussion

and give the hero physical strength and defense, plus counter-attack and other combat abilities, but NOT reinforcements, they shouldn't be given, it's just useless in my opinion.

You're on fire, just like with napalm!
The most useful "other combat abilities" are simply unavailable to mages :)))))))))))) Just as powerful spells are unavailable to warriors.

And reinforcements are essential for warriors to play without losses. The key word is "warriors," because mages have little mana, and reinforcements don't require mana, unlike healing spells.