Has anyone loaded 2 saved searches (of disparate record types) in the getInputData entry point of a Map Reduce Script? I need to load a transaction search and a custom record search. I'm having a hard time conceptualizing what will get passed to Map. Any guidance is greatly appreciated!

You would need to do each search and then combine the results into an array and then return that. That array with the results will get passed into the map.

or if you have an actual link, use query and return that from the getInpu

or use SuiteQL to possibly combine your 2 searches into 1

If the record types are related (parent-child), you may be able to combine them into a single saved search. If not, then the SuiteQL suggestions are likely the better option, as you have more flexibility in join criteria.

If you're using one of the searches as a reference, such as item data for a transaction update or bill of material revision creation/update, you can cache the relevant data. There's also the really sloppy kludgey way of shoving it into an object that's included with every element of your array, but I don't recommend that for any scaling solution.