Didn't we cover this already that Palutena's and Krystal's staff are vastly different with Palutena using hers as more of a telekinesis whacking tool and Krystal using her as more a bo staff (think Killik from Soul Calibur). their playstyles would be different as well.
here's how I'd like Krystal to play:
Neutral B: Fire Blaster - hold B to take a fire stance and let go of B to fire. It doesn't charge but lets you aim in any direction. bit of knockback and damage and probably used to make your opponent paranoid.
Side B: Ice Blaster - Bowser's Fire Breath with ice properties. can aim slightly up or down and gets shorter the longer it is out. might freeze opponents like IC's Blizzard.
Up B: Rocket Boost - straight up recovery. can aim slightly left or right and can be cancelled in the air by letting go of B. good knockback if you hit someone on the way up.
Down B: I haven't decided on whether it should be the shield from Adventures which is the generic Starfox reflector or Ground Quake working pretty similarly to Metagross but being able to be charged (ground quake could work as a down smash but i see down smash as being similar to Ike's or Sheik's as a GTFO move)
A-A-A is a simple one two whack with a finisher. tapping A will do the Adventures multi-hit spinny attack. dash attack would be either a jab with the staff or, after sticking the staff into the ground, doing what can only be described as a horizontal pole vault maneuver before using the momentum to bring her around the staff back to where she was (it all happens much quicker than how i described it).
Side tilt being a reaching kick attack using the staff to balance herself. Down tilt's a sweeping leg kick. Up tilt's a jab upwards or a multi-hit propeller attack (spinny attack but upwards).
Up smash is a wide sweep with the staff (great range and knockback). Side smash is the charge melee attack form Adventures complete with charging light that goes up the staff from the game (great knockback and fantastic kill move) I covered down smash already. No idea about the aerials yet.
This all sounds very unoriginal but it's pretty much how I'd like Krystal with a staff to play as. It's simple with no unnecessary gimmick. I'm pretty sure Sakurai could come up with a much better moveset than mine though