I would suggest an activity such as a levequest or dungeon that is meant entirely for gaining gil and doesn't offer other incentives and can't be spammed. Or perhaps provisioning like quests for monster drops that reward players with gil. I see many suggestions to level up a DoL or DoH class to make gil but where exactly do they make their gil from? Certainly not selling to NPCs, it is from selling to other players. The DoL make gil by selling their harvest to DoH; the DoH make their money selling their wares to everyone but mostly DoW and DoM classes. So if the DoW and DoM classes are the primary gil *generators* then it filters down through everyone else.