Quoting ~*rip to my baby november:" a knife....she will climb...on things...and there isnt a change she has lived with us for a year now...its not a change."
is there a way you can make it so the knifes are not available to her?
I would try making her feel loved and valued, give her attention. A child that is going that far out of thier way to destroy things is looking for major attention, which means she isn't getting it. Try doing daughter dates where its just you and her, and none of her siblings. The rewards system works greatly as well. anytime she DOES do something right or kind, awknowledge it and get excited about it, she will see that doing good gets her attention, instead of doing bad. For discipline, that all depends on the forms you have been using.