What is the usefull cap on Lower Resist

[Cdnexpat]

I can't remember, at what level are all breakable poison immunes broken.

[Mad Mantis]

The highest breakable Poison Immune will have 110 Poison Resist. All other Poison Immunes after that will have a much higher Poison Resist. In order to break 110 you'll need a Lower Resist of -55%. That can be reached at level 10.