1-superthrive her like crazy as a prep to help prevent shocking her to death.
then soak the pot till i have soup,
fish out the root sytem and carefully transplant into new fluffy soil.
I like this one. I've successfully moved plants which were well-rooted in clay pellets this way, with no transplant shock if few roots are damaged.

Go easy on the Sthrive, it won't stop transplant shock- but avoiding breaking roots will.