Laughing Banana
Weeping Pickle
It's not that I don't like Panne, I just have like, 40 characters. She can't be used all the time.
You switching in switching out? It's best to focus all the exp to a core group of people instead of spreading it out. And Panne just happens to be one of the best characters that you can depend on to be a part of that focused groups.
Hmm, it is also pretty much agreed by many that she is the best character to have in a Lunatic gameplay (barring excessive use of DLC maps/grinding, of course.)