I just finished a long game with my friends at my home... we played without crashes with this configuration: Mindcrack modpack + every mod in Universal eletricity modpack + mistycraft + Xeno's reliquary... we were only 4 so no lag at all...and we had optifine multicore... we edit the universal eletricity config files to not generate the ores of universal eletricity because of balance game and because universal have compatibility with mindcrack ores and vice versa, we left only the platinum ore generation because greg tech is so difficult...however the platinum is still rare! We set the universal eletricity to industrial craft energy conversion ratio to 1:1 so universal eletricity is not OP... we left the gregtech expensive recipes but we allowed the crafting of the old and loved mass fabricator instead of matter fabricator.... we had a lot of fun!!! If you can try this setup and tell me what do you think...i hope that there will be a pack with this configuration