You need to learn to be able to research, if you are unable to do that then you probably aren't fit to run a sever (Hint: Technic is supported by a decent host)
That would be fine if minecraft was designed to take advantage of it.
Notice how I said "direct indicator of performance" instead of doesn't influence performance
https://en.wikipedia.org/wiki/Megahertz_myth
Multi Core's only increase performance if the program is designed to take advantage of it
Program's will not use anymore ram than they need
Mod packs arnt particular hard to do but however the who "magic + tech" thing has been done to death, creating proper well thought out quests takes a lot of time