Thanks for the advice, but I'm personally not too keen on using tools for practice. Besides, this is nothing really serious, just mildly annoying.
For ReimuB, it just feels like she should be a bit stronger. Dunno, maybe I just got spoiled by needle shots in other games. But for me, she has a bit more trouble than other types overall. ReimuA is homing, MarisaB is piercing, which is very useful in a few places, MarisaA is very strong and has splash damage. ReimuB has no special features, and a bit more punch would balance it out. Then again, it's not that I mind it being the slightly harder type, just something to keep in mind.