Have Morte taunt black abishais with his Litany of Curses. Commence the beating; magical weapons/spells only. (Dak'kon's karach blade, for one.) 7000 XP a shot isn't too bad, especially early in the game. And the abishais will respawn and respawn. The gift that keeps on giving.
...that is, aside from getting good XP, the abishais drop some minor goodies that you could sell. You could also go around and Litany the thugs, too, for the loot.
