All these posts showing what the venom sting can do to others, but Kaine's resistance to such attacks seems to be completely ignored.
So I'll say it again.
Kaine has been hit by lightning (or something similar) and he jumped right through the chest of Mammon, a pure energy being, to save the human host trapped inside, both times all it did was make him cry out in pain then he instantly went back into the fight. Bio-electric shocks are supposed to faze him?
Is Kaine more durable than the guys in all those venom sting posts? Perhaps not. But, is the venom sting stronger than lightning and an energy being whose release of energy earlier in the issue fried and knocked out Firebird (basically a fire elemental)? I highly doubt.