Are you experiencing muscle weakness? Fatigue?
I also have polymyositis which is an idiopathic inflammatory muscle disease and tests like that are normal to determine if you have it and how bad.
they are not tests normally ordered for lupus unless you are having muscle problems in which case it would be a good idea to have them. If you have muscle weakness and your rheumy is recommending these tests you should get them. You don't want to have something like myositis and not treat it. If you think lupus is bad .....
Get a second opinion if you are not happy with your doc.
MCTD (lupus, scleroderma, polymyositis). Diagnosed 2005. Kidney, liver, GI tract, dysphagia, raynauds, Barretts esophagus, quadriplegic in 2005. Recovered and now active in skiing, tai, chi, hiking, golf. Meds: prednisone 2.5mg, imuran 50mg, amlodipine, benazapril, omeprazole, potassium, folic acid, vitamins, maxide and various supplements and vitamins.
Remain optimistic and you can overcome the odds.