Which artifacts are best to equip a hero with?

I like artifacts that allow you to replenish your army directly during a campaign (Charm Necklace, Diplomat's Order, etc.). Although this bonus isn't large, it can be useful when far from your castle. For example, it can be used as cannon fodder to break through gates or to take out the most powerful enemy unit in a single attack. The main thing is to have more neutral creatures on the map. All other artifacts are sometimes vitally necessary, but I prefer those that increase the army's strength. A hero without an army primarily needs artifacts with resistance and a powerful ranged attack (so that the enemy, even if they reach the hero, can't do much damage). Personally, for leveled-up Barbarians, I consider armor and a ring of regeneration to be the most valuable artifacts.