My husband's thyroid tests also showed high Reverse T3 ratio.
There were a few options our LLND offered. One was switching over to NDT - he tried - but failed- as the side effects were hard on him...and he wasn't willing to 'stick it out' to longer to find out if it would work. ( I think he tried for about
6 -8 weeks)
Another option was to support his adrenals and see if that helped. One option was to add Pregnenolone supplement - which he did...that didn't seem to help.
My husband also has an untreated lyme infection...so maybe that's what he really needs to do.
Here is a link to the STTM website section on the Reverse T3
www.stopthethyroidmadness.com/reverse-t3/