Secondary skills in Heroes 3.

1. Logistics. 2. Air. 3. Earth. 4. Wisdom (in 4th place because it is usually given at level 6 – that is, I hope to get the first three skills in the early levels, either in huts). Further, depending on the hero (strength-magic, etc., for example, intelligence or tactics), troops (shooting, attack, defense, leadership, luck, water, or even fire may be relevant), terrain (scouting, navigation), as well as available magic and additional artifacts (if Berserk is present, fire is definitely needed).