First of all ME and CFS are NOT the same and neither one is the same as FM. There is a school of thought that CFS is the result of ME (myalgic encephalomyelitis) or a broader condition called post-viral fatigue syndrome (PVFS) Dr. Klimas has done some interesting work but her expertise is mostly self-appointed/promotion. She unfortunately has hung around another Floridian by the name of Barry Hurwitz which has sort of tarnished her reputation. Immunologists Dr Klimas BTW is primarily an allergist) have been plying with the whole idea of fixing everything with "vaccines" since the mid 50's.Restoring the immune system which is these guys goal may or may not be an answer. Even where PsA has been found to be the result of reactive arthritis, it doesn't normally get better if it doesn't get better on its own.
In all that time only one curative "vaccine" has come to fruition. It treats a particular form of Bovine cancer. BUT out of that whole mish mosh of research came interferon which while occasionally helpful to cancer treatment lead to an AMAZING discovery. Its called ENBREL.
In any event, about 35% of all PsA patients have co-occuring CFS or FM(S). These are secondary conditions and are SYNDROMES not diseases. Now in all practicality a disease and syndrome are the same thing EXCEPT when it comes to treatment.
You always treat disease first and then syndromes. A lot of the syndromes get under control when the primary disease gets under control. fatique is a huge thing with PsA,. Whether it is caused by one of the co-ocuring syndromes or by inflammation is always a question.
But heres is the sobering fact. Your question of what to do has a very simple answer IF you do not aggressively treat the PsA, it won't matter if you have FMS/CFS/ME. PsA is progressive and will destroy joints and even organs. You will in time be debilitated by the disease it won't matter how crushing the Fatigue. You will be so loaded on opiates to control pain, you won't know id you have FMS/CFS/ME. There are treatments for the neurological effects of FMS/CFS/ME and even the fatigue that work very well with the PsA. Beyond that the only difference is with CFS as opposed to MF/FMS is that withone your exercise regime should contain a sbig aerbic portion and with CFS, it should not.
While the immunologist are still trying to cure things there is a medical specialty devoted to treating the combination. It called rheumatology. YES there are all kinds of alternative/integrative techniques that can help. Frankly if oneself purple and pumping ozone into their bowels helps go for it. (I see a 90 year old craniosacral therapist) BUT only after one is using either biologic or DMARD medication to control the progression of the disease. when that is accomplished the you treat the symptoms.
BTW thanks for understanding my rather warped sense of humor on the ozone thing...............