But that doesn't seem to be the case here. With Python I would have used a parser like lxml or BeautifulSoup (and I'm sure there is something comparable for JS) coupled with Requests async methods. That would probably not only end up with shorter and more concise code, but also be a lot faster.
One advantage is that it's not always instantly obvious if you'll need JS to execute before you can scrape a page. If you start out with a simply html parser and then find out that you needed the JS to run first, you're going to have to start over. If you start out using phantomJS and then find out that you don't need any of the original JS to run, your script still works.
I guess phantomjs is a good a tool as any, but there is really no need to evaluate Javascript for a bit of plain HTTP+HTML parsing.
> return [ $($('h2 a')[0]).attr('title'), $($('h2 a')[1]).attr('title') ];
which are 2 css selectors and picking an element. That is pretty much covered by all of the available http parser libraries