I thought about this awhile back, and kind of compared it to a martial arts ranking. Eventually you get a black belt, and it stops there. But we all know that some people are black belts, and some people are _black belts_.

In other words, I don't see a need to break up the saints into various levels, but if you want, you could imagine that we are at different degrees of saint, i.e. I'm a lowly saint, but Ovid and merlyn are first degree saints. vroom would be an eighth degree saint. The degree doesn't really matter, but if you want something to aspire to, there it is.
( The formula, btw, is min XP = 3000 * 2 ** $degree )