Guild Wars 2

I’m a mesmer running a condi build with Staff/Sword-Pistol.

I rely on the Pistol to stack bleeds, but when I switch to the sword, I also have Sigil of Intelligence & Sigil of Earth. I think this would give me at least 3 stacks of bleed in addition, but I don’t know if Sigil of Earth stacks like this.

Further, I use the same on the Staff, but don’t know if a Sigil of Earth on another wep would also contribute to the stack. If not, I’ll switch it for Sigil of Agony, or something passive to help my survivability.

Sigil of earth effect triggers with a 60% chance on crit, so even you have 3 100% crits you still need to get in that 60% to get your bleed stacking.
On a 50% crit chance you have a 0.6*0.5 = 30% chance per Hit to bleed.

It also has an internal cooldown of 2s, meaning that once the effect procs, you need to wait at least 2seconds before benefiting from it again.