The alchemy tree's "Raises toxicity by how many level 1 recipes you have" is an awesome perk, especially at just 1 point. Right now I have 168 toxicity so I get to run around with a decoction all the time and now have to worry about going over when I need a swig of thunderbolt or swallow. The one that restores health on hit is especially useful.
Interesting don't use Decoctions often mainly Potions and Oils but now that im looking at it Alchemy might actually be really good, having a Dedoction on whenever you want and able to chug down other potions, might reconsider my spec. Can you spec so much in the alchemy tree you can have 2 Dedoctions on at the same time?