The custom harvester has been available in the main scrapebox GUI for some time now. If you haven’t used it its a great tool that allows you to scrape 20+ search engines and allows you to add your own.
Now you can use the custom harvester in the automator. So you can setup all engines to scrape and then do everything else that you want to do as well.
Also in the next update you will have the option in scrapebox to adjust retries for proxies for the custom harvester.