As with all my packs I try to limit to 50 or so mods so it can run on lower end pc's but try to give the feeling of a kitchen sink pack.

Silent Gems but Deadly Chaos has tech galore, Silent Gems, Soul Shards, Tinkers Construct plus extras, EnderIO plus extras, Immersive Craft, ProjectE, Inventory Pets, Grappling Hooks, Just Jetpacks, Expandable Backpacks and just to make it more interesting Rough Mobs. Not a hardcore pack but Rough Mobs make standard vanilla mobs much more deadly. There's more mobs including Ender mobs, reptiles and more to be added.

(I really think we need a firebat mob that spawns near lava and shoots fireballs in random directions)

Pack includes liteloader Permissions Here and voxelmap

Ender IO (by CrazyPants_MC)
Fast Leaf Decay (by lumien231)
Graves (by fireball1725)
Iron Chests (by progwml6)
Forestry (by SirSengir)
Just Enough Items (JEI) (by mezz)
Chance Cubes (by turkey2349)
Better Builder's Wands (by Portablejim)
Industrial Craft (by sfPlayer)
OpenComputers (by Kethtar)
Soul Shards: The Old Ways (by SgtPunishment)
Silent Lib (by SilentChaos512)
Silent's Gems (by SilentChaos512)
Quark (by Vazkii)
Durability Show (by 61352151511)
Ender Crop (by DrMathiasDJ)
More Overlays (by feldim2425)
Reptile Mod (by crackedEgg)
Silent's Gems: Extra Parts (by SilentChaos512)
Immersive Craft (by McJty)
ValkyrieLib (by ValkyrieofNight)
Environmental Tech (by ValkyrieofNight)
Mike Dongles (by MrAmericanMike)
EnderCore (by tterrag1098)
Wawla - What Are We Looking At (by darkh4x)
Neat (by Vazkii)
xLib (by TheXFactor117)
Levels (by TheXFactor117)
Just Enough Resources (JER) (by Way2muchnoise)
Inventory Pets (by Purplicious_Cow)
Just Jetpacks (by Kloonder)
Grapple Hooks (by Kloonder)
Mantle (by mDiyo)
Tinkers Construct (by mDiyo)
Extra Utilities (by RWTema)
Waila (by ProfMobius)
Waila Harvestability (by squeek502)
VoxelMap (by Mamiya0taru)
FTBLib (by FTB)
FTB Utilities (by FTB)
Inventory Sorter (by cpw11)
Rough Mobs (by Lellson)
Edible Bugs (by eractnodi)
Tinkers' Addons (by oitsjustjose)
Tinker I/O (by gkbm2011)
Ender Zoo (by CrazyPants_MC)
ProjectE (by sinkillerj)
Expandable Backpacks (by Lellson)
Excore (by elix_x)
Forever Enough Items (by elix_x)
Crafting Tweaks (by Blay09)