Secondary skills in Heroes 3.

In my opinion, leadership and luck are USELESS!!!

essentially, this is true - during the initial stages, the chance of them appearing is +3, which is 12.5%, meaning 1 in 8, and the power is +100%. But the same attack has a +30% damage property and is constant: obviously, [attack] 1.3 * 8 turns (10.4) > [luck] 7 + (1 * 2). And the same applies to ranged attack and defense, which have a similar effect. I usually find that leadership and luck constantly appear on units that disrupt the enemy's attack:) but for attack stacks - not really...