» Sat May 28, 2011 6:23 pm
The quality of your poisons and potions will improve as your alchemy skill improves, and as you get better alchemy apparatus. Your alchemy skill also determines how many ingredient effects you can see, so if you want to use poisons a lot, you should definitely have a high alchemy skill and try to get the best equipment you can for it.
As far as I know, the ingredients you use don't effect the strength of your potion effects, just the effects you get, although a potion can have multiple effects if the combination of ingredients you choose has more than one effect that is shared by at least two ingredients. So certain combinations of ingredients could allow you to stack multiple poison effects for greater effect. Just make sure that when trying to make poisons, you don't get any positive effects, as if you create something using alchemy with even one positive effect, the game will automatically count it as a potion, and you will only be able to drink it, not use it as a poison.