do not rotate, if they are wearing poorly you may not see it because you are rotating the tires, I run mine in the same position and have 50,000 miles on them. Next spring I will purchase 2 new ones and the will stay in place just as these have been.
If you insist on rotating, spare to drivers side, drivers to passenger and passenger to spare. Or if you prefer do it clockwise, spare to passenger, passenger to driver, driver to spare.
Just as an FYI, in all our travels we have not had a spare and have never had a flat tire.