Can anyone review my MarisaA UFO 1cc and see if there's anything I'm really doing wrong, except for the retarded deaths abundant throughout Stages 5 and 6? I shouldn't have finished 0/0, I know I can do better than that. 
First of all, awesome UFO chaining there on stages 1-3, probably the best I've seen in this thread (although I haven't actually looked at that many UFO replays).
Boss!Kumoi's first spell card, if you don't think you can move to the opposite side mostly unfocused to stay under her, just wait on the same side, concentrate on just trying to dodge, then wait for her to come back to your side.
Stage 4, Midboss!Nue, if you've got two mini-UFOs and a third one floating around, summon the UFO and explode it for another mini-UFO. Otherwise, just try to collect a blue one. Either way, you should have a blue UFO as the last one you collected when Nue flies away. This is so you can set yourself up for a perfectly-timed blue UFO against the yin-yang orbs that come shortly thereafter.
I'm actually not so sure about misdirecting Murasa's giant anchor all the way to the side during her first spellcard. The light blue bullets that end up floating over can be a bit of a pain. I try to misdirect it to the corner, myself.
Shou's final spell card, I find it easier to dodge the blue bullets coming up from the bottom first, then deal with the ones coming down from the top.
Byakuren's penultimate spell card, if you want to finish off the card as soon as possible, sit on the right side as she spawns the first wave, move to the left during the second, sit on the left during the third, move to the right during the fourth, and repeat as necessary.
In general, though, you don't have any major errors in terms of strategy, just small nitpicky things like the above. I think most of your mistakes come from being too focused on one small section of the screen slightly above your hitbox. Remember, not all hazards come from above. Try to plan an extra step ahead whenever you can; in particular, look ahead in whatever direction you plan on moving before you actually move. It's a very useful instinct for dodging skill.
