It is the last major patch before 1.14 (which changed file structures) and is the most stable version for nearly all legacy mods, including Drop Rates:
Located in the /save/ subfolder (keep this folder to keep your characters) Diablo 2 LOD 1.13c Portable
for better performance and higher resolution scaling on modern Windows systems. Maphack (optional) It is the last major patch before 1
To make the most of a portable 1.13c build, most players consider these tools mandatory: 1. PlugY (The Survival Kit) Diablo 2 LOD 1.13c Portable