In the middle of winterspring there is a lake, on that lake there are ghosts, 2 types, each can be downed in 30 secs or so.
They are really easy to kill. and are all over the lake for an easy circuit. You can grind these till 58!, really fast exp.
anyways, the way u get the money from them,
they drop the recipe *icy chill* which sell on ah for 10g+
i grinded from 52 till 58 there and i got round abouts 45 of them drop, thats 450G! you can easily get 150g from outland piece of cake
so thats it
hope it helps!
Shameonyou!