Nice one ;P Here are some ideas abut makeing gold & coins being useful

so we get active BAs and Job system
Alchemy rates should be 1x(so we don't get thoes +15 freaks around)
SOM Weapons in the npc = 100coins & 300mil gold
SOM Equip in the npc = a total of 150coins and 500mil for a full set(equal to 20-30coins & 60-100mil for each part)
SOM Accessory should be around 120 coins and 400mil(25 coins for a ring, 30 for earrings and 40 for necklace.. or so)
and yep.. when it comes to trade run rates.. they should be atleast 5x

so u could make around 50mil from a trade
Adding jobcave with high stones drop rate would be also good.. or just add stones in npc for 1mil/each(this way ppl would still have to go trade to get higer then 61%)
(don't forget to add immortal for atleast 100mil/each :P)
You could also add coins drop on npc thiefs/hunters- so ppl could get coins from there beside Battle Arena..
CAN'T WAIT FOR THIS TO OPEN :P Our team is in !