Hello!
Could you add FTB Unhinged?
Link: https://www.curseforge.com/min…dpacks/ftb-unhinged/files
FTB Unhinged is a 1.5.2 modpack based on GregTech 3, it has mods like Thermal Expansion, Applied Energistics and quite a few more, it runs well on very old PCs and isn't resource heavy, it's a modpack made by the FTB Team and the developer of GregTech himself, GregoriusT!
Thank you for your time!