I think the easiest way to explain what I mean is by giving you a scenario.
Suppose I am dual wielding two one-handed weapons. In my main hand I have a sword with a sigil of blood which has a chance of stealing health. In my offhand I have an axe with a sigil of air which has a chance of causing a lightning strike.
Will the active proc of stealing life from the sword proc only when I am using the first three skills from my sword or will it also proc for the skills from my axe?
Will the lightning strike active from my offhand axe proc while I am using the spammable first skill from the sword or does it only proc when I use my two last skills from the axe offhand?