updated plugin from https://github.com/cooye/swex-artifact-efficiency
reminder:
Artifact Efficiency Plugin for SWEX
Add the release .asar file to your SWEX \plugins folder and watch artifact efficiencies as they drop for quick comparison. Follows the efficiency math from SWOP and SWGT.
Thanks to Xzandro and Cerusa for the original runedropefficiency code and math.
EDIT: as of 14/09/20023: https://www.reddit.com/r/summonerswar/comments/16idmio/state_of_swex_after_patch_809/