Just letting you know i120 was never max, we went from i110 to i130. But regardless, I would recommend you get the story done. The whole process is again similar to the pre-50 levelling, and if you remember, the best thing to do was just continue with the story. You can do your levelling roulettes if you want to supplement this, but the story was the first place for a lot of people, and it will unlock a lot of content for you (in fact, I think most of the zones are locked off until you do the story).