Which treatment works the best and fastest for lymphoma?

Different kinds. We have now identified many different types of lymphoma that respond differently to chemotherapy - and indeed, we often tailor the chemotherapy to the lymphoma type. So, not all chemotherapy works the same with lymphoma. Your oncologist will work with you to explain the various options. This is also why second opinions are sometimes a good option.
To see oncologist. Lymphoma is a chemosensitive disease. Chemotherapy combined with targetted therapy would be the recommended treatment. I recommend you to discuss with your oncologist for detail information about what type of chemotherapy regimen, schedule etc. Radiation therapy , sometimes, is also required in addition to chemotherapy at certain cases.