Silkroad gold players will receive a weapon depending on the job you chose.
If the thieves and archers do their jobs right, then your team should be getting enough combos to get an S rank without worrying about getting hit a lot by Hookah and others. The biggest mistake you and your team can make is getting the attention of too many monsters in the boss room. A crappy run takes about 20 minutes. (That's how long mine took with a thief, two warriors, and an archer who kept on running around and attracting razor crabs).Once your party has killed Hookah, you can go back to town and talk to the NPC to finish your quest. You will need to talk to him/her again to activate the job change. Silkroad gold players will receive a weapon depending on the job you chose, and a skill reset scroll. Congratulations, your character has been promoted!
