Why level 50? Something particular you want at that level?
Do you have any of the boa heirlooms that give you increased XP? If not, it still goes super quick these days. Just make sure you don't waste time on green/grey quests and keep moving, and queue for random dungeons, they are a lot of experience. Also, mining and herbing gives XP now. I've seen people get that far in a couple of weeks, but they're crazy, more likely a couple of months at a casual pace.