Pug Craft

Pug craft has all of the mods I have found to improve the gameplay of Minecraft and I have combined them all to make a decently hard playthrough and a fun experience

this includes 

Applied energistics 
Refined Storage

Mekanism

Mekanism Generators

Thermal Dynamics

TConstruct

Galacticraft

Avaritia

Quests

Draconic Evolution

Ender Storage

Enviormental Tech 

And Many More

 you can go to other planets get other items or become to over powered to a point where you cannot die

and since its a modpack it wont be as easy as just adding mods to a pack so you will actually have a challenge