Mixed connective tissue disorders are often both
cutaneous and systemic inflammation with arthritis
and features of several rheumatic disorders.
Your auto immunity is still active with high lab numbers.
PSA often has features of axial spine involvement.
In your situation the specialists need to communicate
and participate with you in treatment planning. Have
your cardiovascular risk profile evaluated for additional
preventive treatment. Consider Mediterranean diet in
managing chronic inflammation.
If you have the resources to find a university or multi specialty clinic with dermatology rheumatologist
consultation that should help. Keep advocating for
better symptom relief and further treatment.