I'm kinda new to it but I think it works like this.if 2 ingredients with the same effect on each=creates a potion/poison. If an optional ingredient is added that shares a same effect as one of the others, that effect will be added into the creation. (Death bell and salt pile = slow)Death bell also has damage health, so does imp stool. Combine all 3 and you get damage health and slow in the same poison. Is the value of the single ingredients what makes the end value of the potion, or is it the effects combined?