Doedre's Skin is what I thought of first too. The text says that socketed curses ignore curse limit, and I don't see why they wouldnt do so if bane triggered them.
Bane can't trigger them because in that case they have two triggers - Bane, like Curse on Hit, is a trigger for curses, and Doedre's Skin applies it's own trigger to all socketed curses. Skills with multiple triggers are always disabled.