Using SuperSEOVPS for offpage SEO and backlink research. I like the SuperSEOVPS because it has a lot of different paid tools for research as well as different SEO Software for article creation, image edititing, and more. You can learn more about their custom VPS loaded with GSA SER, MoneyRobot, Ahrefs, Majestic and much more.
http://bit.ly/2okAV7E