Well i think that zapping was a very nice start for this technology its a very weak version of what is coming along...People are working on much better ways of accomplishing the same goal of eliminating parasites.
No I don't think you should zap less I think you just need to have yourself better prepared to begin the zapping cycle and then you can just routinely zap for maintainance. I'm not the expert on The other cleansing methods, there are others here who could much better address your preperation for zapping that would help with the die off. My area of expertise is really the technology, especially the newly emerging stuff as well as the studies that have been done on these devices.