I am assuming you meant the best settings for the PETG filament… If so I grab my nearest temp tower off of Thingiverse and make a custom one for the temp range of the e-sun PETG filament. Make sure you set your temp tower highest to lowest as it is quicker to change temperature that way… I make them and run them in Cura because the script for it generated by the customizer. the results of the print test tower will tell you the best temperature to use for the filament by how it looks.
Next grab the bridging test it is a series of small stacks… This will help you refine your retraction settings. The next tests are your intended print and how well it turns out