Suggested Farm #1: Western edge of Holdings of Chokhin from the Vehjin Mines portal in the sourth to the edge of the lake in the North. Reach this portal by running north through Vehjin Mines from Jennur's Horde.
Threats & recommended skills
Threats: general anti-melee. Be cautious of nearby plant foes with dervish & elementalist members
Tactics: No special tactics; pull a group at a time if possible.
Recommended skills: anti-knockdown skills may be useful, less so for a spirit spammer
Spirit Farmer works perfectly well. Foe is a giant with necromancer skill accompanied by 2-3 melee only mobs.