This modpack adds a couple things along with the Alex's caves mod to make playing through it a little easier and a little more exciting.
JEI and Appleskin allow for a little more info on what to do and how to craft some of the more convoluted recipes in Alex's caves, and Sophisticated storage / backpacks make storing all the stuff easier
Exploring the ocean cave can be hard without an easy way to get water breathing potions so i added Giacomos fishing nets for easy pufferfish
Undermod, Alex's Mobs and Apotheosis adds a couple structures and bosses that will both pose a challenge and also give you some loot to fight the Alex's caves bosses
Along with some other QOL additions for a playthrough that skips the boring stuff and gets you right into the action