SkyFactory 2.4 is alredy on Aternos modpacks, but is not updated yet to 2.5. Is only avaliable to Curse and FTB Launchers.
Modpack links:
http://www.feed-the-beast.com/…b-presents-skyfactory-2-5
http://mods.curse.com/modpacks…b-presents-skyfactory-2-5
Official modpack description:
It's skyblock like you've never seen it before! High tech mods, full automation, and chicken sticks! Sky Factory starts the player in the void with nothing but a tree and a *single* piece of dirt between you and certain death! Version 2.5 adds a variety of new mods to the pack and gives the player much more choice than ever before. The option is now available to begin in the classic void world or Botania's Garden of Glass, which allows the player a different set of challenges. Pick up your achievement book today and start your journey