Don't know of any in abymsal sea but the two popular camps are one zone south in the hunt, on on the coast just west of the kerran village right outside of SOM and one inland north of that. I've killed a lot there with a charmed rhino and I've never seen one drop however. There are also kobolk with a k on the end camps east of SoM along the coast of the warrens but those are even lower level(LB at 60).
The most popular place to farm 51 spells are under neath the central island in lake rathe, the only other two spots that I can think of they drop are by the names snake at phants and maybe envar though I'm not sure of that.
Edited, Aug 1st 2011 8:22pm by SefanaPPO