Question on Poison Stacking Mechanics

I haven’t played enough with Poison, but I was considering trying out a Poison composition.

If I have two different creatures who inflict Poison, and they have different attack values, how does the Poison stacking work? (Is the Poison damage based on who applied the Poison first? Or who applied the most recent Poison stack? Or who has the higher attack value?)

It’s based on whichever creature has the highest attack value. The duration of the debuff is also extended using the same rule.

Excellent! So I just need to get a high attack (nether) Moon Hunter … and if his blade bounces to anyone who already has poison stacks, the damage of the existing stacks get upgraded.

(I am not sure whether Moon Hunter is the best approach, but it seems like something fun to try.)