I think you meant MarisaA and not MarisaB; MarisaB makes ReimuB look strong, and while it has lots of versatility the damage is absolute trash and requires shotgunning with the wood type to do any real damage.
On the note of bombing though; stage 5 post-midboss pretty much vomits power items. Run it with ReimuA or ReimuC and you can bomb literally the entire way from midboss to boss and only lose about 1 power in the end.
My point with MarisaB is that she can kill enemies during stages better than anyone else. MarisaA would truly be good, if her focused/unfocused shots were reversed. She plays more like Youmu solo in IN (from a scorerunning perspective), so if you're good at staying focused
only when you need to move, then go for it.
The only sections past midboss-Orin that are really a concern are the "pellet hells", but only the second one actually gives you Power. And if you're playing ReimuA, just gap the shit out of it (the second one, anyway). The enclosed streaming section can be done pacifist, and the part before the boss is simple streaming (read: no need to bomb unless you
really screwed up). If you're really concerned about regaining Power, here's a few more stats to keep in mind:
Second "pellet hell": 2.8 Power (56 items)
Enclosed streaming: 1.7 Power (34 items, 20 of them from the two yin-yang orb enemies)
Closing section: 1.2 Power (24 items)
This assumes you actually collect all of the items (and that's a
very big assumption if you don't have a spread).
