Guild Wars 2

Superior sigil of rage has a 10% chance to gain quickness on criticals, how does this work if I put one in my main hand weapon and one in my off hand? Is it 20% chance or does it simply ignore one keeping it at 10%?

I think it’s a ten percent chance when using main hand weapon skills (1-3) and a 10% chance when using the offhand ones (4-5).
This would allow for mixing effects such Rage and Water which offers a 30% chance to heal allies.
Your axe with the Rage rune would trigger quickness on skills 1-3, your shield with the Water rune would trigger the heal on skills 4-5.