A custom modpack for me and friends' server.
It's Pixelmon, with some added tech and vanilla+ features. Everything is fully configured (to the best of my abilities). I do highly recommend using a datapack to enable vanilla mob spawning, though.
I've also added and configured a whole host of performance mods, with the goal of improving FPS and stability. Optifine is NOT recommended.
The main featured mods include:
Pixelmon (duh)
Create
Applied Energistics 2
Oh The Biomes You'll Go
Along with some other cool, quality-of-life stuff:
Traveler's Backpack
Corpse
Waystones
And more!

