It would be very wise to have these tests before making a decision. For example, if you have TSI or Trab, you probably should have TT instead of PT.
Also, Thyroglobulin and Thyroglobulin Ab would be quite telling. (you can read about that in the Thyroid Manager link)
TPO Ab
Mild to moderately elevated levels of thyroid antibodies may be found in a variety of thyroid and autoimmune disorders, such as thyroid cancer, Type 1 diabetes, rheumatoid arthritis, pernicious anemia, and autoimmune collagen vascular diseases. Significantly increased concentrations most frequently indicate thyroid autoimmune diseases such as Hashimoto thyroiditis and Graves disease.
http://labtestsonline.org/understanding/analytes/thyroid-antibodies/tab/test
As you can see, TPO is "suggestive" rather than definitive.
TSI
Normally, there is no TSI in the blood. If TSI is found in the blood, this indicates that the thyroid stimulating immunoglobulin is the cause of the of a person's hyperthyroidism.
Negative test results means that the autoantibodies are not present in the blood at the time of testing and may indicate that symptoms are due to a cause other than autoimmune. However, a certain percentage of people who have autoimmune thyroid disease do not have autoantibodies. If it is suspected that the autoantibodies may develop over time, as may happen with some autoimmune disorders, then repeat testing may be done at a later date.
http://labtestsonline.org/understanding/analytes/thyroid-antibodies/tab/test
Trab
http://www.ncbi.nlm.nih.gov/pubmed/17684583
TPO (antimicrosomal antibodies) TBII (thyrotropin-binding inhibitory immunoglobulin), Thyroglobulin Ab, ANA (antinuclear antibodies), (thyroid hormone panel) TSH, Free T3, Free T4.
You can look this stuff up here and more.........
http://www.labtestsonline.org/
Substances not found in normal serum (scroll down to autoantibodies)
http://www.thyroidmanager.org/chapter/evaluation-of-thyroid-function-in-health-and-disease/