Guild Wars 2

So it’s been a while since I played and I’m out of the loop on how internal cooldowns work on sigils. Are any of the ICDs for sigils shared or are they all exclusive of one another?

A character can always equip two sigils at a time (either one sigil each on a main-hand and off-hand weapon, or two sigils on a two-handed weapon). In general, the two sigils will both provide their effects independently as long as the base sigil is different. The exceptions to this are the stacking sigils: only one stack effect can be active at a time.

Examples:

- A warrior is wielding a greatsword with both a Superior Sigil of Air (chance to deal additional damage to target on hit) and a Superior Sigil of Earth (chance to inflict Bleeding on hit) attached to it. Both sigils will roll their chance to activate on every attack the warrior makes, and each sigil will run its own cooldown timer after it activates.

- A thief is wielding a main-hand dagger with a Minor Sigil of Agony (5% Bleeding duration) and an off-hand pistol with a Major Sigil of Agony (7% Bleeding duration). Only the major sigil’s effect will apply, giving the thief +7% bleeding duration.

- A mesmer is wielding a scepter with a Minor Sigil of Bloodlust (gain a stack of +Power for every kill) and a focus with a Major Sigil of Perception (gain a stack of +Precision for every kill). The main-hand’s stacking sigil will take precedence, and the mesmer will only gain stacks of Bloodlust.

http://wiki.guildwars2.com/wiki/Sigil

Keep in mind that the stacking sigils will work in conjunction as long as you are not running 2 or more stat stacking sigils. It is possible to have up to 4 stacking sigils in this way.