Cognomen's Cassowary
First Post
The guide seems solid to me. My biggest problem is the name--my Latin training makes me twitch at the conflicting declensions.
("Bellator" is nominative masculine singular, "arcana" is either nominative feminine singular, or nominative neuter plural. The "proper" title would be Bellator Arcanus, or possibly Bellatores Arcani.)
Okay, way late to respond here, but I only just saw this comment.
There is one possibility you have overlooked. "Arcana" could be a substantive adjective in the ablative, LightningArrow utilizing the ablative of means. Thus the title translates as "Warrior by Way of a Secret Woman." Now all that remains to us is to determine who this mysterious woman is who is granting powers to all these eldritch knights. . . .