good idea, i'll remember that.
but you wouldnt lose your stuff unless you customized the config. auracascade generates a fresh config on the next start.
My own Modpack. Yay.
HOW TO MAKE A CURSE MODPACK. it's no full tutorial, but i link it here anyways.
simply jetpack enchantments conflicting with auracascade enchanter. i'm not sure how to fix this, but deleting the auracascade config might be a good attempt. im a bit in a hurry atm, sry