Okay, so, I used McEdit to copy and paste my base into a Resonant Rise world, but... it's giving me a crash report. Here's the link: http://openeye.openmods.info/crashes/b3e5a869d082b70923b9e9f1748517e6
It looks to me like it's trying to replace a Forge Multipart piece with a flower from Botania. Does anyone know how to fix this?

probably not, there are most likely different mods between the 2 modpacks that have there own blocks and items, alot of these things would disappear in my opinion i would not try it its too risky. i would just start up a new world on resonant rise, it is fairly easy to become OP just get a transmutation table and create a digital miner to mine diamonds for you

EDIT: i have no experience with your situation