Yes, I knew that electricball file was the culprit as soon as I inspected the mod files, and deleted it with no mercy. Problem is, when I compress the files and try to install the mod, for some reason the new Launcher doesn't seem to recognize the install.xml file, wich is odd because the file is where it is supossed to be. I only deleted the electricball cooked file that you mentioned and nothing else.
Oh, and thank you very much for your prompt reply, Kikina.
OK, I deleted the electricball cooked file and edited by hand the skills.txt (and did the same in Dank's optionals, which I am using, because otherwise it would overwrite Naga's edited skill.txt) and now I got back the real Lightning Orb with its wicked field damage killing dozens of demons in a blink of an eye. The animation and the projectile are still the ones modified by Naga, but that's a minor issue... The trickiest part is compressing the mod file: if I zip the root folder, the new Launcher won't recognize the install.xml file, but if I open the folder and select everything, the install.xml file and the rest of the files and folders and zip them into a mod file, then the Launcher will do it fine... Thanks again for your time and help !