@sdcgcarroll Patient Power offers tips, but a lot of their articles like this one just rehash common sense stuff like moderate exercise, prioritizing, decent sleep, stress reduction, and diet:
https://www.patientpower.info/myeloproliferative-neoplasms/living-with-myeloloproliferative-neoplasms/im-exhausted-10-tips-for-coping-with-mpn-fatigue
HU helped my fatigue, but if you've taken that off the table, you might talk to your GP. A few younger ET patients I talked to some years back found Adderall helpful for fatigue.