Rogue offhand weps: high dmg or high ratio?

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I would love to hear some dev confirmation on this. From what i see, "swings" (potential damage) do not really generate aggro as much as actual damage does. Example, when i first engage, double attack goes off for mainhand and offhand (quad), missing 2, and landing 2. Meanwhile, monk lands one flying kick and steals aggro. Now my swings combined outdamaged monks kick, but his 1 attack takes it. So harder hits generate more aggro, regardless of fast or slow swings?

Edit - It's funny, back when i played in 2000, this kind of discussion didn't exist nor did it matter lol. I remember playing a shadowknight and gearing for all INT, not knowing what AC was and its mitigation properties