You know it's true. Basically people probably haven't bothered since the only way is to Exorcism until 60% when she flies down!
Ive looked around and couldn't find any documentation that any paladin has ever killed it. Not even any non-ranged class. Thus, I claim it.
Proof!
http://www.youtube.com/watch?v=BBaoYcrJcWY
Don't start flaming, if there is some other pala who has done it and documented it, please tell.