I am attempting to modify some values in this mod so that they can stand against some of the more powerful mobs in a server I own. I have the correct version of forge setup and the configurations built. I am also using Eclipse. However, I keep seeing errors in basically all the files and I am not sure how to fix them (e.g: functions referenced from the base game not existing, or methods missing parameters when called). The part that throws me of the most is that I know the mod runs as is, with no compilation errors both by itself and in a modpack.

All I can theorize is that my process for editing the mod is invalid because I cannot get the mod to even work out of the box in an IDE. This is emphasized by the fact that my Forge development environment does indeed run when I remove the mod with no errors. I would greatly appreciate help on this.