Which artifacts are best to equip a hero with?

I like artifacts that allow you to replenish your army right during the campaign....

When playing as Haven, skeletons raised by the amulet for necromancy are very helpful! :D Or fairies created by the druid's amulet, when playing as Haven! :D

...Personally, for well-developed Barbarians, I think armor and a ring of regeneration are the most valuable artifacts.

I wouldn't say so! Two rings for life are enough, and it's not so easy to take down the Barbarian himself, you can even go to the battlefield with gloves for movement! :cool: