I don't know if they are better places, but I got quite a few of em in nektulos (wolf/bear), EK (wolf) and OT (cat).
In nektulos there are many of em wandering in the shadowed men pit, and around SW of neriak.
EK between 4 and 3 on map is the place I know.
OT from outpost to SW to SE.
I think OT may have the highest number of spaws, but since they are higher level they're obvious slower kills.
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