Ascendancy: Unlimited is a modpack that is balanced around being unbalanced, and using every mod at your disposal in order to try and become as strong as possible.

Find wild interactions between Apotheosis and Silent Gear, using Reforges and Affix items on your modular gear in order to create insane weapons
Fight ever-strengthening mobs with Silent's Power Scale, Infernal Mobs, and Apotheosis. You'll need to use every tool at your disposal in order to become strong enough to fight them.
Explore a beautiful surface and terrifying caverns thanks to Terralith and Lithostitched
Tons of structures to loot and raid
Tutorial questbook to help new players find their bearings in modded minecraft! (currently unfinished :()

Ascendancy also adds tons of new tech, magic, and everything in between to support many approaches to becoming broken.

Install cybernetics and create black holes with Oritech
Create custom spells with Ars Nouveau
Store your items with Refined Storage
Engage in a Geas with Malum
Explore the world of Pastel
Enchant up with a multitude of enchantment mods and the Library of Alexandria from Apotheosis
Dine to your hearts content with Farmer's Delight and many Addons
...and Many More

Even if combat or exploration isn't your forte, there's always something for you in Ascendancy: Unlimited.