I am not affiliated with FTB, nor is this pack. This is also not in any way a copy of or replacement to the updated FTB Revelations pack on their site, but rather a pack that I have personally modified from the Legacy FTB Revelation that exists on Curseforge.

This pack is an updated, modified and heavily expanded form of the classic FTB Revelations modpack, primarily designed with addons, fixes, and balancing in mind.

Some notable removals of mods that were in the original pack include IC2 and all things related to it, Applied Energistics (Replaced wholly by Refined Storage), Project Red, and all of the bee related addons for Forestry.

The biggest addons involve the mods Tinkers' Construct (Also includes Constructs Armory, and mainly involves compatibility for various materials in the pack), Draconic Evolution (Draconic Additions), Botania (Natural Pledge, Extra Botany, more), EnderIO (Endergy), and with by far the most powerful addons, Thaumcraft (Thaumic Additions, Thaumic Augmentation, Planar Artifice, and more). Embers and some of its addons have also been added to contribute to early and late game with powerful Heat modifiers and Aetherium items.
There are also a LOT of optimizations, tiny mods which fix old bugs, add compatibility, allow for recipe changes, or just make the game prettier.
A number of modded items (Especially end-game weapons) have been rebalanced through the use of Crafttweaker and Damage Rebalancer. In general these changes only affect very late game weapons and items, pushing them closer to Draconic items in power.

Revivify

Actually Additions

Actually Additions Fluxified

Actually Baubles

Additional Structures

Advancement Locator

Advancement Plaques [Neo/Forge]

Aetherium Ashen Armor

Aetherworks

AIOT Botania

Akashic Tome

Alfheim Lighting Engine

AnimEmis RL

Animus

AppleCore

AppleSkin

Aqua Acrobatics [Forge]

Aroma1997Core

Aroma1997s Dimensional World

Artifacts

Astral Additions