those poisons are equal to dp, so they will work at that level. I am in the process also of working up poisoning, it has gone slow and is very pricey. Luckily all I've had to buy was the nightshade, and a buddy made the kegs. I had tons of kegs to use. I would reccomend only doing 80 poisoning if youre gonna have 120 weapon skill, or 120 magery, other than that you will want to raise it higher.