I would also suggest doing the daily roulettes as the Adventurer in Need job. Doing all the duty roulettes will net you plenty of Gil. Roll Need/Greed on all dungeon gear and turn them into the GC for Seals. You can use those GC Seals for materials that are hot on the market. Coke, Petrified Logs, Hardened Sap are always in demand. If you are doing fates in the 5.0 areas, you can spend your Gemstones for mats as well. Instead of opting for a gear upgrade with tomes, you can opt to buy mats to sell. Level your gatherers and collect a map once a day to either use for yourself or sell.

Hope this helps!