You purchased the Application yet you did not even think of asking the developer directly?
Duping is not a way to go.
I suggest you record a packet that you hitting a monster.
Then, replay that packet 100 more times with 0 delay. With this, every time the monster respawn you will 1hit it.
E.g: MuPie (Google it its an old Packet base 1 hit hack for Mu Online)