Secondary skills in Heroes 3.

I don't remember if it was mentioned in this thread, but it was said that instead of increasing leadership and luck, it's better to equip artifacts, because you can pump up (spend skill slots on) skills that can be removed by other artifacts...

So, why take up 4-5 artifact slots for morale and luck when there are more useful artifacts that can be put in those slots... such as, for example, spellbooks and others...