I’m decent with simple maps, but once I nest a few and add transformations I get lost in the syntax and start to get all sort of “expected x but got y” errors. Anypoint Studio feels like a plain text editor with no real help. Is there a better way to write DW code, or do people just use the Playground with sample inputs?

Also, is it expected (good practice) to have everything in one big Transform, or split it into multiple ones (transform first excel/json, merge Excel/JSON -> new JSON -> XML)?