I would recommend a task system, seeing that rpgers are probably 70% of the whole community on a 7.4 server, also I think classicus had pretty good exp stages and those are 1 - 20 level, 20x
21 - 40 level, 12x
41 - 70 level, 8x
71 - 100 level, 5x
101 - 150 level, 3x
151 - 180 level, 2x
181+ level, 1.5x
21 - 40 level, 12x
41 - 70 level, 8x
71 - 100 level, 5x
101 - 150 level, 3x
151 - 180 level, 2x
181+ level, 1.5x