ro zeny is sometimes know as GTB, and GTB is short for golden theig bug.
Weapons to use: +6 or 7 triple ctrical jur
Skills: Enchant posion, sonic blow, soul breaker and meteor assauit.
Party: A priest will do, if you want a safter way, find a tanker or solo.
1: Find the place where there are many theif bug males, if a large spawn of theif bug males come after you, means you are near. Enchant your weapon with posion.
2: Hit the GTB, make sure it gets hit and spawn a meteor assauit to kill the males, if he spawns again, use another meteor assauit.
3: Use soul breaker when nessasary, always do not let your HP fall under 80% or the magnum break or mammonite will kill you.
4: It is best to ask a priest to heal you often as it will save some pots.
5: When the GTB went into hiding, it means that it is going to die, but it will heal itself so it is best to get a priest to runwatch it and kill it.
6: Try to use meteor assauit to kill any thief bugs and other monsters from coming near you, if a GTB card drops out, they will steal it.
7: GTB itself cannot hit you unless he uses mammonite or magnum break, the damage comes not only from this two skills but its reflect shield as well.
8: When the posion effect is canceled, enchant it again, it deals more damage to GTB. Enchant deadly posion will deal about 800+ with your right hand hit but you will recieve more damage and more potions will be needed.
I have come to the end of the guide, thanks for reading it.