cirrhosis

I believe Chromoprismatic staff is the only +PL Acid/Corrode/Decay item and it's only +1.

I've been looking for the exact same thing to no avail. At this point I think it's up to the community to craft them. There seemingly is a lot of potential for corrode-focused builds, given the amount of skills and spells with the acid/corrode, so it's strange that it was essentially ignored PL-itemwise especially three DLCs later. I've thought about modding my own items though I haven't looked into it seriously. Maybe it's about time.