Adding a Trait for Salted Earth to decrease INT or give some kind of enhancement when players stand inside the circle would help utility for DRK. Maybe next expansion we will see more traits for all jobs.

Maybe...Enhanced Salted Earth - Now receives a beneficial effect when under the effects of Dark Arts. Grants a regen potency (of 50 or 100?) when the DRK stands inside their own circle. (Only affects the caster.)

OR

Enhanced Salted Earth - Now receives a beneficial effect when under the effects of Dark Arts. Grants (5%?) magic defense to all party members inside the circle.