::It's a top tier skill, so you can't buy it until somewhere around the end of Normal or maybe beginning of Nightmare. They're fairly short lived, at least at their base skill. I will admit it's pretty nutty, especially when it's planned that each of them (probably through runes) will use various barbarian skills themselves. But, I do think the flavor and vibe works. The barbarian calling upon the spiritual protectors of his homeland and people which now lie, along with the majority of barbarian society, in the afterlife, if not simply ash at the bottom of a fiery chasm. It makes good sense that they would be easily summoned to assist in redemption, honor, what have you, of the Barbarian people.