Diablo II mercenary system was fine, but as you progressed in the game most of them would start to become useless. To fix this issue, my primary objective was to make every mercenary worth havign, with their respective pros and cons.
This is a Mac and Windows compatible version of the mod for Diablo 2 LOD version 1.13 or 1.14. This mod used to be for windows only. I turned the mod into a Diablo 2 patch file (this adds mac compatibility). I didn't edit the work of the original modder(s). Note that this is only the "Guild" mod on top of vanilla D2 but it says the modder tried it on top of another mod. I did this quickly, take it "as is". It should be stable enough but should problems arise, use the official download and contact the mod author.