I’ll try Acid PB from updated Venomlance at some point although it doesn’t look nearly as powerful as Grim League’s new items: Rhovena Kur’s Arbalest, Farros’ Ribbon and Cyrrah’s Hunting Hat that one could use for it.
@Archmagister yes, from Grim Dawn Community League Season 3 - Release Date, Rules & Guidlines, and Installation