What i want to know is how exactly does poison work, and by that I mean:

-What is its damage based on (nn of the ninja that applies it, nn of the ninja that has the skill poision but does not apply it himself(azure fang), is it based on max hp)

-How do stacks work

-What's the max number of stacks

I would really apreciate answers that don't include "I think", "it only makes sense" i would love answers based on testing. Thank you!