I don't claim to be an expert in this field, nor will I assume that all of the traditional virtues are equally worthy.
Auctoritas is possibly not the best virtue to begin with. It's not one that is easily grasped. It seems to have meant a power to influence through prestige or standing rather than through a more direct mechanism of power.
Wikipedia defines auctoritas as follows:
In ancient Rome, Auctoritas referred to the general level of prestige a person had in Roman society, and, as a consequence, his clout, influence, and ability to rally support around his will.
That doesn't make it sound like much of a virtue. But elsewhere it is defined as a spiritual authority and more specifically as,
The sense of one's social standing, built up through experience, Pietas, and Industria.
Industria means hard work, pietas means something like a respectful and dutiful attitude toward the natural order in its social, political and religious aspects, including a sense of patriotism.
If this is so, it would mean that a man with auctoritas would earn respect and social standing through his industry, his experience and his sense of duty towards his parents, his family, his country and his religion.