By Bahamut.Raenryong 2010-10-25 12:25:05
Delay is averaged, so it makes no difference.
Generally highest DMG should be mainhanded, but it can be a bit more complex than that when you have "Occasionally Attacks x number of times" weapons.
To give an extreme example which is a bit misleading, if you were dualwielding on COR with Joy/Mkris, you would want to use Mkris mainhand and Joy offhand. Why? Because if you catch a mob with low HP where Joy will oneshot it and Mkris won't, you will get more TP from having the Mkris hit first. Bear in mind COR doesn't WS using Main/Sub slots typically though so ~
Basically, high DMG in mainhand unless you are really sure what you're doing.