Engines of Mastery was built to be a lightweight modpack with an emphasis on Create and exploration. Most of the mods here are for quality of life, world generation, or other lightweight content around those objectives. There are a few magic mods that I think will operate well with the create mod, as well as pneumaticraft and crossroads to add some additional possibilities and late game content to Create.

Modlist:

Waddles (by Girafi)
XP Tome (by bl4ckscor3)
Better Trident Return (by itsmeowdev)
Ring of Growth [FORGE] (by kwpugh)
Just Enough Resources (JER) (by way2muchnoise)
PneumaticCraft: Repressurized (by desht_08)
Create (by simibubi)
🌳 Passable Foliage (by Snownee_)
Polymorph (Forge) (by TheIllusiveC4)
Macaw's Roofs (by sketch_macaw)
Bad Wither No Cookie - Reloaded (by Kreezxil)
Botania Additions (by ToMe250)
Colytra (Forge) (by TheIllusiveC4)
Just Enough Beacons (by tfarecnim)
Structure Gel API (by ModdingLegacy)
Morpheus (by Quetzi)
Botania (by Vazkii)
JEI Enchantment Info (by Phylogeny)
Tetra (by mickelus)
Immersive Portals (for Forge) (by qouteall)
Bag of Yurting (by Commoble)
☃ Snow! Real Magic! (by Snownee_)
Occultism (by kli_kli)
Buzzier Bees (by TeamAbnormals)
🥝 Kiwi (by Snownee_)
CoFH Core (by TeamCoFH)
Sophisticated Backpacks (by P3pp3rF1y)
TerraForged (by dags_)
🍊 Fruit Trees (by Snownee_)
Abnormals Core (by TeamAbnormals)
Repurposed Structures (Forge) (by telepathicgrunt)
Ding (by ohaiiChun)
Jousting (by stepcros)
Comforts (Forge) (by TheIllusiveC4)
Placebo (by Shadows_of_Fire)
iChunUtil (by ohaiiChun)
JAOPCA (by TheLMiffy1111)
Back Tools (by ohaiiChun)
Farming for Blockheads (by BlayTheNinth)
Crossroads MC (by Technomancer_isTaken)
Better Advancements (by way2muchnoise)
Trample Stopper (by UnRealDinnerbone)
Blame (Forge) (by telepathicgrunt)
The Conjurer (by ModdingLegacy)
MmmMmmMmmMmm (by bonusboni)
Login Protection (by someaddon)
GraveStone Mod (by henkelmax)
Bookshelf (by DarkhaxDev)
Majrusz Library (by Majrusz17)
Infernal Expansion (by InfernalStudios)
Ping (by Girafi)
Eidolon (by elucent_)
Genetic Animals (by mokiyoki)
Forgery (by unascribed)
Water Strainer (by Ruuubi)
Construction Wand (by ThetaDev)
Dynamic View (by someaddon)
Savage & Ravage (by TeamAbnormals)
Structurize (by H3lay)
Building Gadgets (by Direwolf20)
AI Improvements (by DarkGuardsman)
The Endergetic Expansion (by TeamAbnormals)
Spartan Weaponry (by ObliviousSpartan)
YUNG's API (Forge) (by YUNGNICKYOUNG)
Waterworks (by Terpo)
Ensorcellation (by TeamCoFH)
Ice and Fire: Dragons (by alex1the1666)
Essentials (by Technomancer_isTaken)
Track API (by cam72cam)
Refined Storage (by raoulvdberge)
Armor Toughness Bar (by tfarecnim)
Pane In The Glass (by MongoTheElder)
Curious Elytra (Forge) (by TheIllusiveC4)
Chocolate Fix (by AlcatrazEscapee)
JEI Integration (by SnowShock35)
Large Ore Deposits (by EnderLanky)
Botany Pots (by DarkhaxDev)
Curios API (Forge) (by TheIllusiveC4)
Wither Skeleton Tweaks (by Shadows_of_Fire)
Immersive Engineering (by BluSunrize)
Dungeon Crawl (by XIROC1337)
Crafting Tweaks (by BlayTheNinth)
Snow Under Trees (by bl4ckscor3)
Pandoras Creatures (by andrew0030)
Oh The Biomes You'll Go (by AOCAWOL)
YUNG's Better Caves (Forge) (by YUNGNICKYOUNG)
Macaw's Bridges (by sketch_macaw)
Archer's Paradox (by TeamCoFH)
Universal Mod Core (by cam72cam)
Farmer's Delight (by vectorwing)
Transport (by Sky_Som)
Quark (by Vazkii)
AutoRegLib (by Vazkii)
Quark Oddities (by Vazkii)
Macaw's Furniture (by sketch_macaw)
Scuba Gear (by ModdingLegacy)
AstikorCarts [Horse Carts] (by MennoMax)
HT's TreeChop (by hammertater)
Mantle (by mDiyo)
Reap Mod (by henkelmax)
Xaero's World Map (by xaero96)
AmbientSounds 3 (by CreativeMD)
Better Burning (by DarkhaxDev)
ItemPhysic Lite (by CreativeMD)
Attained Drops 2 (by Shadows_of_Fire)
Spice of Life: Potato Edition (by Kevun2)
Biomes O' Plenty (by Forstride)
Compact Machines (by davenonymous)
Controlling (by Jaredlll08)
Advanced Chimneys (by EnderLanky)
Forgiving Void (by BlayTheNinth)
Mana and Artifice (by AWildCanadianEh)
Name Pain (by naqaden)
Blood Magic (by WayofTime)
ForgeEndertech (by EnderLanky)
Potions Master (by thevortexFoxTopia)
YUNG's Better Mineshafts (Forge) (by YUNGNICKYOUNG)
Advanced Hook Launchers (by EnderLanky)
Cooking for Blockheads (by BlayTheNinth)
Callable Horses (by Tschipp)
Immersive Petroleum (by Flaxbeard)
SwingThroughGrass (by exidex)
AttributeFix (by DarkhaxDev)
Atmospheric (by TeamAbnormals)
Doggy Talents (by percivalalb)
Immersive Railroading (by cam72cam)
Culinary Construct (by TheIllusiveC4)
Total Darkness (by tfarecnim)
FastWorkbench (by Shadows_of_Fire)
Gauges and Switches (by wilechaote)
AppleSkin (by squeek502)
Craftable Horse Armour & Saddle [CHA&S] (by EwyBoy)
More Waterlogging (by tfarecnim)
Fast Leaf Decay (by olafskiii)
Guard Villagers (by almightytallestred)
Just Enough Items (JEI) (by mezz)
Chunk-Pregenerator (by Speiger)
Mutant Beasts (by Chumbanotz)
Traverse Reforged (by Noobanidus)
Inventory Tweaks Renewed (by David1544)
Overloaded Armor Bar (by tfarecnim)
Caelus API (Forge) (by TheIllusiveC4)
Extra Boats (by TeamAbnormals)
ReAuth (by TechnicianLP)
Patchouli (by Vazkii)
Notes (by Chaosyr)
MineColonies (by H3lay)
Charm Reforged (by svenhjol)
RandomPatches (Forge) (by TheRandomLabs)
FastFurnace (by Shadows_of_Fire)
Artifacts (by ochotonida)
Lock & Key (by ModdingLegacy)
Ambient Environment (by Jaredlll08)
ServerConfig Updater (by Darkere)
mGui (by mickelus)
Easy Redstone Extras (by MacTso)
Performant (by someaddon)
ObserverLib (by HellFirePvP)
Supplementaries (by MehVahdJukaar)
Pretty Beaches (by BlayTheNinth)
TipTheScales (by Jaredlll08)
Chicken Chunks 1.8.+ (by covers1624)
Extra Golems (by skyjay1)
Spartan Shields (by ObliviousSpartan)
Off Hand Combat (by aya_shamelessmaru)
Valhelsia Structures (by ValhelsiaTeam)
CreativeCore (by CreativeMD)
Miner's Helmet (by ModdingLegacy)
Toast Control (by Shadows_of_Fire)
Refined Storage Addons (by raoulvdberge)
Titanium (by hrznstudio)
Mouse Tweaks (by YaLTeR)
Upgrade Aquatic (by TeamAbnormals)
Inspirations (by KnightMiner)
Dynamic Surroundings (by OreCruncher)
Curio of Undying (Forge) (by TheIllusiveC4)
Immersive Posts (by TwistedGate)
Clumps (by Jaredlll08)
GeckoLib (by ThanosGecko)
Crafting Station (by tfarecnim)
Citadel (by alex1the1666)
DefaultSettings (by PT400C)
CodeChicken Lib 1.8.+ (by covers1624)
Ceramics (by KnightMiner)
Floocraft (by FredTargaryen)
Nature's Compass (by Chaosyr)
Realistic Horse Genetics (by sekelsta)
Curious Armor Stands (by ochotonida)
NetherPortalFix (by BlayTheNinth)
Potion of Bees (by Commoble)
Astral Sorcery (by HellFirePvP)
Mystical World (by EpicSquid315)
BetterEnd (Forge) (by Beethoven92)
Sound Filters (by Tmtravlr)
Horse Tack (by misteriawolfe)
More Dragon Eggs (by Darkere)
Friendly Fire (by DarkhaxDev)