Hello there :)
In case you found this site for whatever reason, I just want to inform you that I just made this modpack for me and my friends. It has 300+ of the coolest mods (I also count bug fixes and stuff like that so it's not really 300 awesome mods).
It's curently kitchensink. I don't know whether I will change that later on. I would have to learn a lot about CraftTweaker for that so yeah...
Additionally, this pack contains Millénaire. An awesome modification which blows some life into Minecraft with Villagers Colonies of different cultures. We already played this mod when it came out back in the days. You can spend hours on that but you can't just sit there and give those guys a lot of resources and wait until they finish their village. That's why there are plenty of other mods you can play around with. It's tech, magic, adventure and combat. So there should be something for everyone.
In case I made you curious and you want to play this pack, you should know that this is eating a lot of performance because it has so many mods. I heavily configured the mods and adjusted things here and there to make it as lag-free as possible but you still need a good rig to run the modpack. I guess atleast 6GB of RAM. We personally play with 8GB. There are also some optional Java arguments, you can use. We had the problem that the game was pretty fluent (around 140 FPS) but every few seconds it froze. With these arguments, it was no problem anymore and now we can play this satisfying modpack. In case you want them too, there you go (credits to Twingrey):
-XX:+UnlockExperimentalVMOptions -XX:+UseBiasedLocking -XX:+UseLargePages -XX:ParallelGCThreads=<threads> -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=15 -XX:-UseAdaptiveSizePolicy -XX:+ExplicitGCInvokesConcurrent -Dfml.readTimeout=600
Note that you have to adjust the "XX:ParallelGCThreads" value.
This points to the number of your threads (NOT CORES). So let's say you got a quad core with hyperthreading, that makes:
-XX:+UnlockExperimentalVMOptions -XX:+UseBiasedLocking -XX:+UseLargePages -XX:ParallelGCThreads=8 -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=15 -XX:-UseAdaptiveSizePolicy -XX:+ExplicitGCInvokesConcurrent -Dfml.readTimeout=600
Yep, okay. That's pretty much it. If you really play this big boy, for whatever reason, have fun.