You can give
For Rheumatoid Arthritis, you can give IMMUNE SERUM , PAIN CARE SERUM BALANCE SERUM along with PERFECT HEALTH SERUM.
Spondylitis requires PAIN CARE SERUM , so it will be covered in above.
I used BRAIN SERUM for spondylitis for a lady and it helped.
You can add GYM SERUM for posture.
Also check the emotional status of the person, most of the joints disease are due to trapped emotions , so you can send her MOOD UP SERUM or MAHA MRITUNJAY MANTRA.
You can do VOB, Write her name on paper and then write "ALL JOINTS IN BODY" and do VOB on this paper
Sharat Sir’s video has also helped many.