They did try to shut it all down with the catheter ablation but ran into problems with the phrenic nerve. I am all for the idea of being fully paced, but not with the thought of also not being able to breathe unassisted. I was so disappointed when I woke up from that surgery only to find that they were not able to complete the goal.
Sorry to read the suffering goes on, I know you have tried "everything". I don't know the answer to your question about the mini-maze but I can say it didn't stop my AFib. As I was having open heart surgery for a valve problem they did the mini-maze to see if it would stop the AFib, it didn't.
I'm sure you know better than I, but it is my understanding that it is possible to shut down the heart's biological electrical system and run it under full pacemaker, not sure how that is done, but thought the shut down could be done with a catheter.
Being an open heart surgery survivor, with no complication that I yet know about (1 year later), I can say: scarry, but it "ain't so bad". I had a great surgeon and great hospital and intensive care nursing staff, love them all.