At last I made it work. See the silly results:
93 DPS 2.7 weapon does the same dps as 100 DPS 2.8 weapon when compared to a 2.7 mainhand.
(Using Talon as an example of OH, altough it is MH).
So, 0,1 seconds of difference between MH and OH makes an increase of 7 DPS in the weapon completely worthless.
