The specific thread to use is one of those quilting myths.
Use what works for you. There is no evidence (and this is from the thread companies) that polyester threads cut the fabric. Thread is made differently now than 30 or so years ago. If Gutterman, Mettler, or the cheep kind works for you then use it. I specifically like the old Coats and Clark mercherised thread. Can't get this any longer. One must be their own tester about thread. I've used old thread that originally sold for 50 cents. Works fine.
Test the thread and if strong then use it.