Cedon...there are some doseable LoY poisons, and probably GoD, OoW, DoN stuff that not many people mess with. The OoW stuff, for example, seems to require many obscure parts, and even then for lame effect.
Someone posted elsewhere about Paralyzing Neurotoxin, a doseable 30% slow made from a single component fished out of Torgiran Mines...might be worth your time.
eqtraders poison recipes
I'm curious about the black marble mortar and pestle though, and the possibilities it may offer. I doubt many people have experimented with it.