MoF MarisA sucks. The splash is useless in that game, the spread isn't all that good, and ReimuB outclasses it completely in terms of attack power. MarisaC however is nice(my main shot type in MoF)
Reimu Needles will pretty much
always outclass anything in terms of attack power. That's her
point. MarisaA in MoF offers a nice mix between power (which is most certainly not bad, even if it isn't ReimuB's), and spread.
SA Marisa sucks. MarisA may have 8 bombs max, but they suck, you're not going to be getting power back if you use too many, and her attack power isn't all that great either. MarisaB is too weak far away for the average person who's just looking to 1cc, shotgunning requires planning, and her spread isn't even useful in certain stages. MarisaC is a joke compared to ReimuA. And then there's the larger hitbox Marisa has.
SA MarisaA's bombs do suck, but she gets power back at an increased rate, and, what? Her attack power is among the highest in the game. Unfocused
and focused.
True, Patch-Fire is one of the weaker long-range shots, and yes, she requires some amount of trivial planning (it's an entirely different discussion as to who's best for blind runs, but...who cares?), but her spread is useful in
every stage, bar none. If you don't want to put forth the effort required to use her effectively (once again, not nearly as much as people make it out to be), that's FINE. But she certainly doesn't suck. You don't need to be a high-tier Japanese scorerunner to make good use of her abilities.