You need to add more spawns to the 'exp map'. Also more spawns for level 70-120 since as far as I see there are only dls. No frosts, medusas, serpent spawns, drakens, basically all the hard monsters are lacking as far as I can see. We need an update on the map yo!
Perhaps also add some more tasks which grant higher exp but require more monsters killed? I think the cash flow is way too big, too easy to get cash but too hard to get exp so maybe add some more tasks for level 50-120 and make them harder but more rewarding in terms of exp.
Or at least make people choose between getting loads of exp or loads of cash from different tasks.