While Catalyst is good, custom installers (often from R.G. Mechanics) can be optimized for faster extraction, leading to lower installation times.
They frequently separate multiplayer files, non-English language packs, and high-resolution textures into optional downloads to save you space. repack by rg catalyst free
RG Catalyst does not have an official single website (they often move domains due to legal pressure). Instead, they release on trusted public trackers and forums: While Catalyst is good, custom installers (often from R