Arbites
10-25% Damage vs Electrocuted enemies.
10-25% Rending vs Staggered Enemies.
35-50% Weakspot Damage on Second, Third and Fourth shots in a Salvo.
6-12% Critical Chance for each Enemy Hit by your previous attack. Stacks 5 times.
I'm thinking about switching not far behind with no lenience for the final keystone.