Promised Lands is a pack focused around two main mods: Silent's Gems and Apotheosis. Both are capable of making your tools and gear extremely strong... but only in combination with the support mods in the pack. You'll need to use all the mods in one way or another to make good enough gear to take on the random boss mobs you'll encounter in the world.

Modlist:

MCFurnace (by maatfx)
Silent's Gems (by SilentChaos512)
U Team Core (by HyCraftHD)
Metal Barrels (by tfarecnim)
Attained Drops 2 (by Shadows_of_Fire)
Silent Gear (by SilentChaos512)
Simply Light (by Flanks255)
Corail Woodcutter (by Corail_31)
Voyage (by Lykrast)
Crafting Tweaks (by BlayTheNinth)
GraveStone Mod (by EuhDawson)
Spike Traps (by tfarecnim)
Corail Pillar (by Corail_31)
Placebo (by Shadows_of_Fire)
Better Than Mending (by legobmw99)
CC: Tweaked (by SquidDev)
Fish Traps (by ktboogey)
Inventory Sorter (by cpw11)
Useful Backpacks (by HyCraftHD)
Speedy Hoppers (by al132)
Light Level Overlay Reloaded (by oldjunyi)
Tubes Reloaded (by Commoble)
Xaero's World Map (by xaero96)
Cyclic (by Lothrazar)
MrCrayfish's Furniture Mod (by Mr_Crayfish)
Silent Lib (by SilentChaos512)
Controlling (by Jaredlll08)
Apotheosis (by Shadows_of_Fire)
Fence Jumper (by TheRealp455w0rd)
Xaero's Minimap (by xaero96)
Simple Storage Network (by Lothrazar)
Just Enough Items (JEI) (by mezz)
Clumps (by Jaredlll08)
The One Probe (by McJty)
Enchantment Descriptions (by DarkhaxDev)
OpenBlocks Elevator (by VsnGamer)
Reap Mod (by EuhDawson)
Simple Farming (by enemeez1)
Torch Bandolier (by SilentChaos512)
Fast Leaf Decay (by olafskiii)
AppleSkin (by squeek502)
Torchmaster (by xalcon)