For ‘our of the box’ stuff, this awesome bit of code from @john_pierson is going to be your new best friend. It’s still somewhat green so you might have some hiccups, please report them as an issue on the github if you find anything. GitHub - DynamoDS/DynamoGraphMigrationAssistant
For building your own custom stuff, this ZIP file contains some graphs I built for BiLT America last year. There are tools for things like associating graph properties, doing some of the stuff the bulk updater does (like changing the Python engine), inserting your tracker, and the like. Look into how they work and you can learn how to bulk manipulate a LOT of stuff which is pretty cool.