@Kaarme I don't think the pages ever specifically said what kind of % it was using for that anyway, so there's multiple ways it could be calculated. In the games I've played, percentage based damage over time abilities tend to work based off of maximum health. If the 1% is always "1% of max HP," it could be pretty ridiculous on a boss type monster compared to normal expected attack power levels for someone fighting a boss at the expected character level. Another factor is whether or not the bleed effect stacks. It could be either 1 inflicted effect from the dagger at any time on a target, or each instance that triggers it makes its own stack. If so, can it stack infinitely or is there a maximum number of allowed stacks? A lot of balance related questions for bleeds, and they can pretty much each be handled more than one way. Since he's in a mix of game like mechanics and reality, balance isn't necessarily being handled very strictly.
So that'd be along the lines of my current theory for how his dagger worked here. It's 1% of max health, and the bleed can stack as long as you trigger it more than once. Of course, the direct weapon damage to the eyes was probably fairly large too. So, crit hits to the eyes for large damage. Stun and bleed effects triggered multiple times. Stun locked, stabbed, and bled like a stuck pig. I'd still rather see more specific information in the series itself than just assume this or something else is right though.