Here are the packs most of people make:
All mods for that forge version included ( and find some unique way to call it magic, exploration and tech) <----- Booooooring
Nice starter idea just to be ruined by people that might or might not play it but ask for specific mods to be added which will change the course of the original starting idea and yep you guessed it - it becomes pack i described above.
Packs that are needed and in shortage are packs like total meltdown, or journey to the core or crash landing.
Adding all mods and changing few recipes isn't enough anymore ( and lets not forget the "HQM coming in future updates" )
Good luck with you pack and I hope you make something unique, but the moment I read that pack creator is asking "what else shall I add ?", I just know its just another garbage.
This is just my opinion please no one take it personal.