To all archers and alchemists, what is the most deadliest poison you have made in order to confront your hardest enemies? How did you make it?

You'll find lots of recipes here: http://www.uesp.net/wiki/Skyrim:Alchemy_Effects

Thanks

I think the best poisons are ones that just poison their health. Stamina/Magicka are next to useless for me, seeing as NPC's have almost unlimited magicka. So it seems, anyway. And Paralyze, Frenzy potions, etc aren't that good. Most enemies are immune to them.

True, true. Although paralyze is great against bandits and Forsworn.

Purity perk. Deathbell and nightshades. Maybe red wild flowers. You're all set.