My guess would be, for here on the forums, to have one main topic with links to peoples' packs, categorized by archetype name or username, in the main post to be edited by well, whoever would volunteer to do that. People could post to say "Hey I updated my pack and here's the updated link", if the OP missed one, or if there's new packs to add.
It would be kind of annoying to constantly update that as people add new cards to existing packs or make new packs, but it would be appreciated.