Okay I usually write a good few paragraphs so I'll make this one concise.
Modpack created for my friends.
There are two major paths I developed, each centered around about two mods.

Path One - Technology

Mods - Create and Ad Astra

The typical locking of Ad Astra behind Create. The inclusion of createaddition also means that Ad Astra's electricity can be in turn used to boost Create industry. They support each other!

Path Two - Magic

Mods - Eidolon and Undergarden

That's right, Eidolon is back, baby!! I used some of the additional features in this port to lock Undergarden behind magic, fun. Also, ingredients you find in that dimension help out a good bit in further Eidolon studies.

Now, the great exchange part...

Basically, there's some parts of magic progression that assist in technological progression and vice versa. This is so that server members who specialize in one path have to help out members of the other path.
Biggest example is froststeel being used for tier two fuel in Ad Astra. Mostly just magical quality of life offered by create mixers, though.

Karma Three

Ad Astra

Alex's Mobs

AppleSkin

Architectury API

AzureLib

Better chunk loading[Forge/Fabric]

Botarium

Chunk Sending[Forge/Fabric]

Citadel

Clumps

CraftTweaker

Create

Create Crafts & Additions

CreateTweaker

Cupboard

Curios API (Forge/NeoForge)

Customizable Player Models

Customizable Player Models Simple Voice Chat compat

Eidolon : Repraised

Entity Culling Fabric/Forge