How do you know which incorrect or inconsistent citations in your citation audit need to be cleaned up to make the biggest impact? You don’t know. No one does.
Our best guess is that you should clean up based on authority priority – choose a metric like Domain Rank (Ahrefs), Domain Authority (Moz), or organic traffic (also available via Ahrefs) – and gather these metrics for all the inconsistent citations you have. Sort from highest to lowest, and work your way down the list. Even if you don’t get to them all, you’ve started with what we might fairly assume are the most trusted.
Alternatively, just do ’em all. Choose a cleanup service like Loganix, or roll up your sleeves and start sending some emails.