The ranks go in this order.
1) Learner
2) Beginer
3) Novice
4) Apprentice
5) Expert
6) Master
7) Grand Master (aka Guardian)
There are a few tittles to go with the Grand Master ranking, here are a few:
1) Officer
2) Healer
3) Solder
4) Steathmen or women (is like an assassin, spy and thief)