Guild Wars 2

Is it possible to inflict multiple stacks of bleed with one attack? For example “Sigil of Superior Earth” procs while flanking “Cross Fire” under the effect of “Sharpening Stone”? Creates 3 stacks of bleed with one attack or just 1 stack?

I’m not sure about Sigil of Superior Earth, but I do know that the bleeds from Crossfire and Sharpening Stone do stack, as well as your pet’s bleeds; also your pet bleeds from the short bow 4 ability.
At one point i had a build that let me stack up to 22 stacks of bleeds, but i found that to be impractical against bosses because you can only have 25 stacks between everyone. Still, condition/trap based short bow builds are powerful.

to me it seems that they stack