Sounds like a good plan. I would not go pass 4 cycles of
clomid IUI, without re-evaluating the plan. There is your history of endometrioisis and a tie between endometriosis and infertilty has been made. I would also recommend a operative laporoscopy and with these findings,THEN consider the next step. Horrible tubal damage or blockage or surgery on the tubes might result in skipping injectables IUI and gong to IVF, so wait til you have the surgery findings to decided the next step.
HOPE THIS HELPS