These are the only two that will provide a nice balance between consistent leveling and good adena earnings. Groups, if you enjoy hunting with others, are relatively easy to find in Dion.
It is possible to find Turek hunting groups in Gulden, but they are not as common as they once were. This is also a good time to experiment heavily with the Dusk/Dawn competition and start building up a stock of Ancient Lineage2 Adena. Necropolis of Sacrifice south of Gulden is doable solo, but you will be spending a lot of money on healing potions and shots, so you will probably lose money.
Duos and Trios, especially a good balance of damage dealers and healers, can do quite well here, but finding a pick up group is difficult. We spent dozens of hours down here with a three person group: our Palos Knight and two Dark Wizards in Lineage2.
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