I did mine in one hit. With hindsight I would have split it. On my diversion I convinced myself that I had calculated heading and eta incorrectly. Told the examiner I was going to orbit while I rechecked my figures, did this and found I had been correct the first time! I guess that means I should have had a little more belief in my abilities. I was asked by the examiner for all of the particular performance speeds during the test. I checked the POH for the figures, they were somewhat different from the generalised ones on the shop bought checklist.
Remember the six P's.
Proper Planning Prevents P!ss Poor Performance!
Good luck with your test.