RUBIDIUM SERIES ARE NOT SUPPORTED BY THE MODPACK ONLY OPTIFINE WILL WORK
Optifine is Highly Recomended due to the AGRESSIVE ammount of mods (335).
14 GB Of RAM Is Highly Recomended due again, to the Agressive Amount Of Mods.
(I do NOT recommend the use of other shaders (unless you deactivate Distant Horizon) because Distant Horizons adds an Unique MMO style.)
List Of Shader You Can Use :
Shrimple
Potato Shaders
BSL
DO NOT USE ANY UNLISTED SHADER WITH-OUT DISACTIVATING DISTANT HORIZONS
(Psst To Use Shader You Need Optifine)

This Modpack Was Inspired By RlCraft By Shivaxi.
Spoiler... you're going to die a lot.

Automatic install by the CurseForge Luncher is recomended :)

There Is A Lot Of Difficulty Enchancing Such As :
Thirst Bar
Improved AI (Vanilla Mob AI)
No Tree Puching
Temperature & Heat
Realistic Torches
Revemped Nether and End
New Bosses
Famous Lycanites Mobs
Technology And Machinery
And More !