Here I am again, this cheat is for lv30+.

30+
Doing CPQ is the best choice, first go to spiegelmann at kerning or orbis/ludibrium. Then find a party with a spearman, cleric, crossbowman, or a dexless assassin. When you get into the party, ask if you can battle in room 4/5, or room 1/2. Those two rooms mostly drop coins, pick up the coins but leave some the your other party mates because they will get mad and boot(expel) you from the party. Exchange the coins via Spiegelmann, I recommend exchanging for a Gephart, you can find it under thief equips.