Posts from Secondary skills in Heroes 3.
I never take skills like leadership, luck, or treasurer.
Added 2 minutes later
Especially when playing campaigns, I initially choose skills wisely, considering the map conditions, and always save before witch huts.
Warning - please use normal, human words! Ta Kotoraya...
P.S.: I save before every battle, dungeon, utopia, and canser...)))

Орден Феникса – харизматический :) лидер
You transfer the hero to a Castle, and then you can buy a new one. You can keep heroes in Castles, for example, if the hero is resource- and money-oriented and equipped with appropriate artifacts (parts of the Legion + resource- and money-related artifacts), it will be very beneficial.
It is not recommended to keep too many heroes in Castles, as there is a very high chance that the Castle will turn gray, with all the consequences that follow.
Mysticism is very rare, but I remember a map where there wasn't a single well, and all 4 towns were there. The map was XL size. If the Hero didn't have the Axis skill from Inferno, I would have been completely doomed!
And I forgot about the Mage's Well!
Что темный дракон весь мир покорит,
Темный дракон - безликая тень,
Теперь навсегда ночь сменит день.
Он свергнет всех местных Богов,
Ни сила, ни воля не сдержат его.
Рыцарь, король - все одно для него,
С ним в битве исчезнет и зло, и добро.
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Skills: wisdom, logistics, earth magic, air/fire magic, leadership, luck, attack.
In my opinion, leadership and luck are USELESS!!!
P.S. Some people here are talking about tactics, but in my opinion, they are only needed in specific cases or for rushers.
In my opinion, leadership and luck are USELESS!!!
Of course... there's absolutely no difference whether your unit moves once or twice. It doesn't give any bonus at all :D
And if the creatures are of different alignments...
And luck is also completely useless :D. It makes no difference at all whether you deal 100 or 200 damage :D
Leadership, just like luck, is very useful.
Of course, it's useless for Necromancers to take leadership (considering that they will only have their native troops, which is unlikely).