Personally, Tormented Elves have really stood out among the other mobs. They are the only mobs I relate myself too.
After reaching idk 5000 possibly alignment with all elven factons (or less)
an idea; Making a multiblock structure using eldhemir and something would cure them. This will stop it attacking other elves, and killing a cured one would do damage to elven alignments.
However, these elves will sadly never be cured, and will, occasionally, randomly attack anything on screen, excepting the player that has cured them.
"cured" elves would also still attack any other mob, excepting other elves.
Hired High Elven units equipted with eldhemir would also have to power to change tormented elves.
Tormented elves may spawn in the same way as a galadhrim wanderer possibly also.