Thanks for you comprehensive introduction and all that sharing. I have nothing to offer since you have good care, but I would urge you, strongly, to seek at least one more consultation with a different EP. I know there are scads of great, top tier, EPs who specialize in complex cases, which you appear to be.

If you have the energy, motivation, and the resources to travel some, I can suggest two that I know of (not personally, not as a patient) who are highly regarded in the field. The first is Dr. Andrea Natale at the Texas Cardiac Arrhythmia Institute in Austin (call and ask for Norma, his personal assistant and scheduler). He was trained by Dr. Pierre Jais in Bordeaux, France...the great guru of modern electrophysiology. Natale travels and has privileges in at least half a dozen hospitals in the USA where he does catheter ablations. The other is Dr. Pasquale Santangeli at Cleveland Clinic.