Sigil interaction with single-handed weapons
Yes. All your burning duration is increased by 20% no matter where it comes from. Same is true for your crit chance: anything you do that can crit has a 7% increased chance to do so. It doesn’t matter what weapon which sigil is in. No worries.
~EW
From the wiki: “A sigil affects all skills while the weapon set with the sigil is active. For example, with an off-hand sigil of force, damage is increased for main-hand, utility, and bundle skills. The effects continue during most transformations.” So, yes, all of your skills will be boosted by both sigils.
Very nice, ty both for the quick replies!