Always record in 48. You can also always use the old fashioned way, slate the front and tail of each shot. Or just clap your hands on the video. Makes for easy manual sync in post generally speaking, but depends on what you are shooting. Plural eyes is good too, but you can still have drift if not time code locked, so sync head slate, then stretching the audio a tiny bit to sync the tail slate works great most of the time. A bit old school, but I use this for music and documentary interviews all the time to great success in low budge way.