As far as I know damage increasing sigils only work with the weapon skills gained by the weapon they're equipped on. So if you've got a sigil of outlaw on your main hand and a different one on your offhand only your 1-3 skills gain the 10%.
As for if it stacks with a potion, I would assume yes.
Soylent
Member Since 13 Apr 2012Offline Last Active Nov 22 2012 01:27 PM

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