Say I have dagger with 1300 damage and a fire enchant on it for 1700 damage. I hit with the dagger and do 3000 dmg.
I apply a poison to the dagger. Say that the poison does 500 per second for 3 seconds. Poisons say that they override the enchant, and only hit 20% of the time.
With the poison applied, I'm going to hit for 1300 80% of the time, and 1 in 5 for 1300 + 1500 over 3 seconds.
I'm guessing that I don't understand it completely, because that wouldn't be much motivation to use poisons.
Please help me understand how poisons work, it seems like such a cool idea.