Suggested methodology:

Perform hundreds of Light Shots against L50 Amalj'aa Drubber in front of Zahar'ak.
Perform hundreds of Foeseekers against the same target.

Add a significant (30+) amount of DEX without changing ATK or STR.

Perform hundreds of Light Shots against L50 Amalj'aa Drubber in front of Zahar'ak.
Perform hundreds of Foeseekers against the same target.

Parse~