You generally don't need a lot of fancy tools, especially if you can write Python (or bash scripts with curl or something). There are some REST API clients available as browser extensions and standalone programs, which are useful for crafting requests.A cookie editor is sometimes useful as well. There was also a cool Firefox extension I used a while ago that intercepted requests and let you edit request data, but I forget the name. Otherwise, I typically use a Python script for repetitive/sequential tasks. The "requests" module, BeautifulSoup and Scrapy are all useful to that end.
