Greg-E, a skyblock GregTech modpack.

This modpack centers around GregTech, with supporting mods unlocking every voltage. Supporting mods range from Ad Astra to Blood Magic and aren't essential to progression, they only make it easier. However, to finish the modpack, you still need to complete every mod. Exploration is rewarded heavily, even though its a skyblock modpack. Rewards include better GregTech machines, QOL mods or just better recipes for progression.

Unique features:

No Ex-Nihilo or other stuff like that in the pack! You get resources by automating production lines or trading items for EMC.
Steam age is optional!
The modpack is fully playable with new content in every voltage tier (ULV-UHV) and then there is 1 more voltage tier, that tests the limits of your factory. New content is being worked on daily!
Even though there are a lot of supporting mods, each can be skipped without breaking the progression.
Applied Energistics 2 is unlocked in LV, meaning you can start your factory as soon as possible.
I also developed a cu5tom mod for this modpack - it extends GregTech and provides cu5tom machines that will need more management than just providing it correct materials.

Inspired by Star Technology, Project Infinity and Not Too Complicated 2 - goated skyblock modpacks.

So overall - cu5tom progression, cu5tom mods, LOTS of cu5tom content (and a little bit of grind). What's not to like?

Discord link: https://discord.gg/G4ErAdSKUC