Which artifacts are best to equip a hero with?

Of course, each class and faction has its own preferences. Here's what comes to mind right now (for any hero): ring of health, various arrows – stunning, web (for archers, naturally), guardian cloak (granting invulnerability to the first three attacks), a set of boots + gloves for movement, and a sailor's hat, which is also useful if part of the game takes place at sea.