Make them act like Ranger’s Spirits. Activate a Venom gives you, idk, 20 seconds base, 30 seconds with GM trait(since you’d obviously have to replace the one that grants venoms extra charges), where you have a % chance to apply the venom with maybe a 2 second ICD, possibly 1 second. It just needs some sort of internal cd, or else you’d start seeing things like capped immobilize or 25 stacks of torment. If this were implemented, the venoms themselves would also probably have to be changed so that there is no permanent immobilize, or at least not on a short cd, and no infinite chills, but I think this idea could really boost the viability of venoms and might actually make the Skelk venom usable and helpful to both team damage and team surviability.
For balancing issues, different venoms would need different ICDs. No one wants to see basilisk venom shared with a team going off every other second. Another thing with regards to balance, the venoms that are shared would have to deactivate if you move too far from the thief that granted them. This would prevent mass venom buffing at the start of the match then the thief running off on his own. Probably something like 2k-2.5k range for removal of buff.
maybe a 33-50% chance to proc on hit, I like this idea… Venomous aura could give the proc chance to allies when they are in the radius (don’t know which radius could be good without being OP) and only when they are in there. The idea I think is good, it should be adjust with numbers though