suggestions:
- catch enough point items at the first stage to get to Dream Gauge Max after the midboss (works both on Normal and Lunatic), at a high place (they'll boost the Dream Gauge noticeably, though they seem to lower a bit if your shot power isn't high enough -- if you have the two side familiars, it's enough)
- catch as many point items you can, mind Mima's speed (so you can stray away from a point item that's falling, shoot things, generate more point items and have enough time/distance to get in time to catch that falling point item from before)
- ideally, you should have max shot power and max point gain from the shot power items, so if you bomb but doesn't die, you can refill the Dream Gauge more easily than trying to collect point items at the top of the screen (unless when done on boss fights after their patterns)
- play on Fullscreen mode, revert to windowed mode if you need to take a screenshot (especially because if you try to Alt+PrtScr while using fullscreen, you'll get a blank image when you paste it.) by using Alt+Enter (then use Alt+Tab if clicking on other things such as the Start Menu somehow stop working)