So, after a discussion on Chat, Pach and I hashed out a new warrior definition, as seen below.

A warrior is someone who meets one of the following:

1) Fights for a living

2) Fights on a daily basis

3) Has being a fighter a core part of their character*

4) Leads other fighters in battle

5) Has abilities allowing them to fight, and has used those abilities for that purpose

*Killing people can be considered "being a fighter," but only if the killer is fictional (i.e., someone like Dexter Morgan is a warrior, but Jack the Ripper isn't)

After presenting it to the other admins and Beuros, Astro had this suggestion:

6) Commands a warrior/weapon like unit to fight

Another suggestion:

7) Is a representation of a user on this wiki

Any other suggested revisions or additions before this becomes final?