I havent really spent a great deal of time researching kosumoth, just enough to know attunement to the quest is mandatory and that it can be painful on a pvp server, it takes a few hours, and is more easily successful in a group.
Id like to use the forum here to organize a group of players that havent attuned to this yet to get together reasonably quickly and schedule a day to group up and knock this out.
Lets get a small handful that share a few hours of free time together, set a date, get in the research at youtube and get it done.
Im a big proponent of voicechat as the key to smooth runs, so lets all settle on something to use, Id suggest openraid's free mumble client or perhaps the new curse free chat client/server. Ive nothing against ventrilo or teamspeak but no free servers jump immediately to mind. Id use either if someone has a guild server we can borrow for the event.