After going through the supported modpacks I've just found that none of the packs are too oriented for lower end systems. In addition, the pack is still updated pretty frequently. It's not the most popular but after going through a few websites it easily has over 50k installs which in my eyes is more than enough to add compatibility.
This link here includes the server files and the player files: https://minecraft.curseforge.com/projects/atm-3-lite
I know this was posted a few months back but the OP didn't really format properly or give a good reason for the mod, sorry if that breaks a rule.
Thanks