that sounds like the way. also keeps runtime costs down. seems like the trick there would be to build (a|on top of) durable rpa librar(y|ies) that the agents and humans work in so that the automation recipes and their automated updates can be quickly skimmed and sanity checked when needed. add in some live automated testing (assuming you can make this happen with the legacy systems) and maybe you could get really close to fully automating all of it.