What is more important: luck or fighting spirit?

Ha ha, that's funny=)) I thought the Spirit of Despair was useless for everyone except Necromancers=))
And it turns out it's super effective - Dragons -1 to enemy morale + Spirit of Despair, and the enemy is screwed=))

For those who don't understand, if you or your opponent have the Spirit of Despair, then no dragons/devils, luck/morale, or other artifacts will work. The Spirit of Despair/Luck of the monsters (in battle, right-click on the monsters) will be = 0.

P.S. I don't know about the spells, I'll check in the evening.