My guide to money making is simple, of course if they have changed Qo alot then im not sure it will be the same.
All depends on drop rates. Anyway..

Step 1 - Make an archer and get it to Lvl 70 (you 1 hit met doves)
Step 2 - Sit in Lucky Time for a good 2 hours and go hunt in MZ


Now if your lucky and have a good 115-130 archer with good gears.

Step 1 - Gain Lucky time
Step 2 - Go to Advance Map (Alien Apes, Baskilisks and so on)

They tend to drop mad mets and dbs..