There are several homebrew rules that I use while running games in Ara. While none of these rules are required for the setting, I feel like they add a bit of flavor to the setting as a whole or address some mechanics and balance issues I felt were lacking. Most of the writing I have done for this setting assumes these rules are in effect, so I recommend including them in any game set in Ara, though many of them are also perfectly applicable to other settings as well. Ultimately, the choice is yours.