One way to farm is by speed running. This is for sure applicable for everyone. If your main is still in map 2 that's a terrible place to farm. Hence this method of farming is best for you, you could get 15k-20k gold per speed run and moreover you can reuse your equipments unless you buy personal items and lastly you get 3 gift signs per run. This is especially good if your main character is still on low level. It's also a guaranteed gold, not like farming bosses in map 2 which even if you're lucky you still have to find buyers. Mountain clans and firstborn are easier place to farm, it took me 4hrs to finish use strong class and preferably ranged if you have good equipments already.
If you're and end game player, well this is not for you. 15k isn't much to get when it takes 4hrs of your time. But it's really good for noobs who can't event farm 1k per day.