Save equip a weapon find a single mob kill it, check log, reload use next weapon on the same thingy.
Compare logs.
It is bit frustrating to calculate weapon dmg in the game. Too many variables, especially for dual. Easiest way is go with flow and use figures in character tab.
My final dual weapon dmg was over 600 at lvl 34 and 12 points in dual mastery.
Pay attention to firewall. Lvl 34 I had 11 points in it and 5 points in destruction.
Total dmg 510 per second X 5 =2550. Instant killer.
Don’t pay attention to character optimization. It is written by total moron.