Perhaps that rune would only bring it up by a smaller interval. But I doubt the common impression that more reliable poison delivery would be so overpowering, myself. If so, perhaps something else could balance that back out, because as it is, there's really no way to make any kind of sensible poison use strategy, as Aajen points out. And that sells short poison as a whole.

I love the idea of a skill in Poisons to make more reliable delivery. And not just because it wouldn't cost more credits -- because it makes sense, and because the "pre-envenom your sword" thing seems like a great touch.

I believe increasing the venom hit % of poisonists is reasonable, given their knowledge in working with venoms, but not too much though (up to 15% for trans) since it is basically still a trade skill. It would make more sense to have another specialization, or skillset, that perfects venom use in place of traditional knighthood limb damage. Like even higher chances of venom hitting, and complex venom use, by mixing 2 or 3 venoms together to yield afflictions that are not available to other knights.

Ummm, may be it should be a new archtype altogether.

Okay, I've been thinking about this quite a bit, and it is true that the Poisons skillset is lacking the sort of combat edge that you would get from being skilled in venoms and that sort of expertise. Here are a few basic ideas that could balance things out.

MASTERENVENOM
Knowing the edge of your weapons and the optimal application for your venoms, you can envenom weapons with greater effect than a person unskilled in your art. (not much of an increase, just to 60 or 65 percent)

LETHALDOSAGE
Extract a venom in greater concentration than normal. (Basically, it consumes the entire gland to produce a single application's worth of venom which will always transfer on contact and is harder to cure, perhaps taking up to three or four regular cures to fully go away, or just allheale. Syntax to the extent of APPLY LD CHARYBDON SCIMITAR, from a seperate vial)

MURMUR (transcendant skill)
You have studied poisons long enough to know every physiological effect they can have upon an victim. By mimicking or producing these sensations within your victim you can cause them to relapse into the venom's effects. (This would be a sort of chant, wherby you cause the target to randomly relapse into an afflicion that they had suffered some time in the last few minutes. It would run off of balance and charisma, and perhaps replace Anerod for relapse. I don't know whether these murmured afflictions would be cured in the regular way, or perhaps all be treated as a mental affliction)

I think that between these three skills, warriors, merchants and casters could all benefit to their own ability, and poisons could develop as a more combat oriented skillset.