LittleXploit

For anyone looking for a modpack that has boss oriented progression, this should be a must try. Do note that it requires Create to progress and in the current state of the modded minecraft scene that may be a dealbreaker for some. If you do decide to give it a try you'll be rewarded with a thoroughly enjoyable experience, the modpack features a welcome revamp to Create: Enchantment Industry and some features of Apotheosis. I personally found only one aspect that could be considered a big drawback, and that would be the existance of one Iron's Spells and Spellbooks setup that both trivialized boss fights and overshadowed any other styles/schools of magic; this is obviously more of a mod issue rather than a modpack one, but it is worth noting nonetheless.

Great skyblock modpack for people looking for clear progressive goals focused on automation, while avoiding the usual resource generation methods, which the vast majority of the community has gotten burned out of.