Grim Weapon, Furor vs Arcana - SWG Empire

In my Warden playthrough I got a Grim Bow a Grim Runic Sword and pretty early on a Ring of Arcana +0. The Imp gave me a Ring of Furor +2. What do you think I should upgrade and wear? Arcana for a higher chance of Grim activation or Furor for a higher chance through more shots, especially since it’s already +2. I’d rather not wear them both because I like my Chains and Chalice too much.