One morning, out of curiosity and boredom, i decided to try to kill Miss Jeny. She conned yellow to my newly level 44 druid and i thought i might have a chance! boy, was i wrong! first of all, she doesn't root or snare and she runs faster than sow. and, let me tell ya, she doesn't mind running all over NK after you! lol
she hits for 107 damage about every 2-3 secs. i'd say she'd be very good exp. one good thing is that, although Barkeep Milo is in the building with her, he does not aggro when you hit her with spells from outside the building. i'm not sure what he'd do if you just walked inside and started hitting her, though.
i'm not sure if there would be a faction hit. i may wait a level and try her again. i will let you know my findings! happy hunting