Then I run the track to ANOTHER track which is just reverb/echo/etc. Then, I add some automation for things like volume and how much autotune I want at any given time etc. I'll add some eq to a single phrase if I need to. Whatever I can do to make it work. AND.... don't tell anybody but the high harmony is just an old take of the LEAD track pitched up some more and adjusted for the right notes. Yup.