well i work to make money
you know the hidden mape in chrimson wood?
Creep Evil
there are about 3 money sack monster every spawn
there are 2 transformation
1st is the money sack which drop steely,500-1100 mesos
2nd is the purple look monster which drop steely, lucky charm, and 500-1100 mesos
those monster have like 3k hp and can be kill quite easily cause they dont move..

lucky charm drop rate is pretty high, i make around 300 in 8 hours, i sell for 100k each which is 30m already
steely, rarely drop prabably 8-16 hours every drop which can be sold for around 5m
and for money, in 8 hours is already like 10m

and ya..