what OP did was like mixing ammonia and bleach together because they though "hey! both those things clean well!" then they are wondering why it's getting hard to breath.
Yeah you have to be smart when mixing mods man, one you may have duplicate versions of the same mod that and BnB uses minetweaker and a seperate set of configs.
Actually did you even transfer the configs over?
Im not incompetent of course i dont have dupes and I tweaked the configs so there are no id conflicts, I was just saying that to give a general idea of the modpack, obviously i removed minetweaker. i only posted it like that because i didnt want to type out a list of 225 mods