Ocular HUD's effect, all damage the player deals will stack Bleed for the duration.

Does Shatterspleen stack?

Shatterspleen makes exceptional use of this with a bleed stack being applied every time you land a critical strike. With Captain, for example, if you land each pellet of your primary shot, you will apply 8 stacks of bleed and refresh the prior applied stacks.

Does Shatterspleen stack ror2?

10 Shatterspleen

Bleeding enemies explode on death for 400% (+400% per stack) damage, plus an additional 15% (+15% per stack) of their maximum health.