What are some Mods you would have killed to have in another version during it's peak?
For me I would have done anything to have Scape and Run Parasites, Mutation Mod, or The Flesh that Hates back on 1.7.10 in its heyday. I love 1.7 modding for having so many kinds of progression you can't find in other version, but there's next to nothing to Do what you get to the "End-Game" of any pack. There's a severe drought of boss monster mods that provide any challenge to an end-progression thaumcraft player that don't also come bundled with a whole host of items, mechanics and incompatibilities I just don't want.
On a different Note, thinking about the thaumcraft 4 addons that's integrate with astral sorcery if it came out back then makes me sad.
https://redd.it/1j8crt8@MinecraftModded