Modpack used by my friend group and I (json). Always trying to keep the pack as updated as possible for those who want to use it, personally optimized in terms of performance, and as true to vanilla as I can. Not interested in adding mods that I find as "cheating" or against the spirit of the game, only to enhance your experience of the game.
If you want improvements to your performance, first try lowering the quality, render distance, and FPS on the Helmet Cameras mod. Then, try lowering the quality of HD Lethal Company by starting with shadows and fog, then LOD and resolution.