This is the official modpack copied straight from twitch for those who cant play it on twitch like me
Installing a modpack using the Technic Launcher is easy. If you don't already have the launcher downloaded, visit our download page to get the latest version.
Type in the modpack name (FTB Sky Odyssey) or paste the following url into the search box.
Finally, click Install at the bottom right of the launcher after you select FTB Sky Odyssey from the list on the left. The launcher will handle everything else!