So with the new Dual Strike Gem; 70% more damage with the main hand weapon (100% with Ashes of Stars), while using the attack time of the off-hand weapon (Using Bright Beak for 2.10 APS), and finally Slayer ascendency for 8% base crit we have a usable edps crit weapon!

Some other synergies that scale our damage:

• Replica heat shiver for 65% of lightning damage as cold, also allows us to use trinity
• Vaal smite for extra clear and damage increase
• Slayer's masterful form node with Arn's aguish for 27% chance to deal triple damage

Rough PoB: https://pobb.in/zZgJQ4WuD1kK

NOTE: Dual Strike of Ambi is not in PoB yet so I put it on the sword.