Thaummix

I am currently working on Thaummix 2, which will be a 1.12.2 version of this modpack. I am waiting for something like two mods to be updated until it matches this one in every way.

A modpack including many magic mods, not the least of which is Thaumcraft. I tried to include mods that compliment Thaumcraft more than offer magic alternatives.

Mods such as Embers, Astral Sorcery, and Roots will offer smaller, but immersive side projects when Thaumcraft gets grindy.

Ars Magica will compliment your Thaumic spells quite well and fill any little gaps in your magic you may encounter.

Abyssalcraft will give your late game Thaumaturgy some good use with its multiple dimensions and bosses.

And of course plenty of mods for decorating your wizard lair to warn trespassers to beware!

Thaumcraft is version 6 for reference.

I recommend allocating 4GB of RAM due to Biomes O' Plenty tanking performance while generating the world. The pack will run with only 3GB allocated but I cannot guarantee that you won't get "Out of Memory" exceptions when playing.