One of the boons to taking the [mystical traveler] oath is that advanced souls can overcome everyday problems more rapidly than others do. Let's use illness as an example.

While it may take years to heal from an illness or disease, mystical travelers have the ability to shorten the process. Of course advanced souls still have their life charts, and illness may factor in to them, but many times they can tweak their charts to better slide through the adversities of life. They know that their learning process is higher, so they're able to function above these obstacles. 

Mystical travelers don't automatically receive the cures for life's maladies, but they are imbued with great endurance.  (look at Montel Williams: Yes, he suffers from MS, but it never keeps him from travelling and doing good works.) Indeed, many mystical travelers, have very painful illnesses, but the one thing I've seen is that they handle them better and tend to get over them faster than other people do. 

These entities' suffering seems to be more of a mental one from continually trying to make the world better and relieve its injustices...or aat least alleviate the pain of family and friends. But they will find themselves having better health than most...They'll also feel that they're living in a youthful timelessness, no matter what their chronological age may be.