I've been playing vs an arakune alot lately and i think that the only way to win is get ALL the damage you can and not just go for the air combos...i think in this match it is very important to use 236a>5d~b/a ect. as often as possible and 236a is also quite good for controlling ara's jumping when your not really in range to apply normail j.b/5b/6b/2a pressure.
she can win this match, but often you will find yourself jumping around with arakune, not really doing anything while he just runs away if you dont ground him early, i often think in this match up getting knock downs is almost as important as getting off air combos. and yes, i do think that her 214a/b/c are in fact usefull if seldom used in this match in-particular. the baseball can be a life saver if it missed when thrown, the pillow is also great if blocked and the bowling ball can actually make arakune stay in the air longer than he would like and all three can lead to some kina (IMO) whacky combo set-ups...but as i said, if seldom used.