Use "Match Total Exposures" to save some time in Lightroom.
If you have a similar scene you can select many images as I have shown here:
Then make all the corrections to the first photo like you would do in all your "Auto Sync" situations and then go to the Settings in Develop module and choose "Match Total Exposures."
This lets you quickly adjust the exposure of multiple photos to match a target photo. Now you can go back and just select images also and select them and choose your "target" photo and then apply the "Match Total Exposures" and you will save a lot of time that you used to adjust exposures.