The 1.12.2 Pack: Perfectly Complex

The extended support update, extended even further!
A lot of new magic addon mods, and new changes. 

Changes:
• New Mystcraft addons! Added More Mystcraft, Pages, linking-tweaks, Mystcraft / OC Integration, and Myst Library. All of them will enhance your Mystcraft experience!
• New Thaumcraft addons! Added Electro-Magic Tools (IC2-TC6 content), Thaumic Wonders, ThaumTweaks and ThaumicWaila. 
• Also added VoxelMap Fixes (prevents all the VoxelMap crashes & saves on massive amounts of RAM when using a resource pack), Hesperus (Phosphor fork for better world generation performance with Dynamic Lights compatibility), Charset - Storage Barrels, Additional Pipes for Buildcraft, Iron Tanks, Reforged, Space Ambient, Galactic Computers, and Industrial Foregoing / OC Compat. Make sure to learn more about all the new mods over the Mods tab!
• Removed Entity Culling due to the VoxelMap incompatibility. If someone is using a different map mod, feel free to re-add it.
• A lot of small configuration changes, notably enabled more Quark features, and other small tweaks.
• Updated 13 mods to their latest versions, and changed Mouse Tweaks to the CleanroomMC fork. Some of these updates contain useful changes & bug fixes!
 

Useful Links:
Issue Tracker, Discord Server, Get a Server, Donate