Not sure about asura messing around with the legends of other races, to be honest, nor about taking a melee-oriented profession. Sylvari might pick it up specifically to go Ventari, and we know Rytlock has been spreading it among the charr, so there probably are a few of those, even if intuitively I'd expect charr to find revenants a bit iffy. I'd think that an asura would go revenant to discover lost lore (possibly implying that they are in the priory) to spread, or just experiment.