First, I don't use autothrottles in turbulence heavy enough to cause concern with the autothrottles' authority. They will tend to overreact to the speed excursions. The best technique is to disconnect them, fly attitude and N1, and make small manual thrust adjustments as necessary to keep the speed excursions in the desired range.
If you get into conditions like mountain waves, it may well be worthwhile to temporarily move the switch to CLB. When out of it, move the switch back to CRZ to help prevent unwanted excursions.