It will depend on your objectives and/or the distance between your terraces vs. the size of your implements.  On some fields with smaller terraces I set an AB curve to follow the top terrace then follow that curve all the way down the field - ignoring the rest of the terraces.  On taller terraces, I usually use adaptive curves.  I plant one round on the front of the downhill terrace, then come work from the back of the uphill terrace until I fill in between the two.  Usually only a round or 2 so would take way too much time creating/switching AB curves.