Got my Archer from level 7 (yesterday) to level 30 today and levelled PGL to 15 to unlock BRD. Doesn't actually take that long. Think your first level 50 is the longest to be honest.

And this isn't playing 24 hours a day. I'm a student in my honors year with a part time job, girlfriend, hobbies etc etc.

When I log on I just know what I want to do and do it.

Did my 3rd relic quest in a day. It really doesn't take much.