The key of AG is the automation, you'll find yourself using Thermal Expansion for almost everything and anything. it takes a while to complete the pack because of its vast questline with using a lot of the mods.. I found myself struggling with Bees (I'm sure you can imagine why). AG was one of the best packs I've played.Might try some sky map mod packs. Agrarian Skyes 2 and Sky Factory 2 might even be doable. There is a lot less game to process. While keeping the mod count high. If those are to much for the PC then a sky map with less mods in it might work.
Might also be worth looking up the server rules on the bigger servers. You are mostly wanting to look at the rules dealing with lag reduction and server stability. Going by those rules might help out game performance.
Not absolutely certain. Seems reasonable though.
*I said the thing I did about 'No one recommending any 3rd party packs' because I didn't see your post and I finished AG.
AG2 is the 1.7 AG correct? I had performance issues on that one.
Sent from my SM-G900P using Tapatalk