You may ask, why is it so hard? Because it includes...

Tough as Nails and Serene Seasons for a little complication of your daily life;
Realistic Torches to prevent you from surviving the first night;
Spiders 2.0 and Zombie Awarness for total reinforcement of the usual mobs;
Champions and Mutants Beasts for rare transforming everyday mobs into death machines;
Biomes O' Plenty and The Lost Cities for creating a dangerous environment (use one of them in World Type);
Doomlike Dungeons, Reccurent Complex, Roguelike Dungeons, Ruins and YUNG's mods just for a lot of intresting dungeons;
Lycanites mobs for the appearance of fear only at the mention of going to the mine;
First Aid to make you feel pain;
Bloodmoon to make your tears flow;
SCP: Lockdown for even more of all kinds of creatures;
Scape and Run: Parasites to not even give you a chance;
But also a few mods to improve your life: Quark, Techguns, Thermal Series mods, Mr.Crafish Furniture and much more;

LK's HardCraft