I missed the Zodiac Spear, so I went to the Henne Mines to try to get it from that chest. The side effect was that the Abysteels levelled me up to 90 from around 45.

The Vampyr Fangs they drop sell for good money, too.

For loot, I ran around the circular paths in the Westersand, killing those tomato guys. The Succulent Fruits are valuable at that stage of the game. Also in the Paramina Rift fighting the Skeletons yields a lot of Sturdy Bones.

Of course the best way to get money is to defeat the Behemoth King...