Ok so I saw the thread for someone asking for this and you told them you removed it due to not working well. It doesn't work with multiplayer well because people cant see blocks in the world and they appear once they unlock them, this means only one person has the ability to get achievements and expand the JEI, it's said in the welcome screen when you play the first time that when you play multiplayer to get the together forever plugin (links achievements) and invite people with /tofe invite, for the modpack to work in multiplayer, so you could add the modpack back but this time have together forever by default, problem solved.
Sevtech: ages link if you don't already have it: https://www.curseforge.com/minecraft/modpacks/sevtech-ages
Lots of people want this.