Esen to the rescue! =D
I've lost quite a decent amount of exp to KM too .__.
Did it with 2 fighters, 2 clerics, and an archer. Took a while, but it was worth it xD
Had 1 fighter keep aggro on KM (which he did a VERY good job with), 1 cleric healing him, 1 cleric healing me and the other fighter while we took out the mobs.