Danmaku bounded field
You can watch a replay to see more exact movements. There are many ways, here is mine:
3rd wave
stay somewhat above from bottom and dodge waves coming from below
move down to bottom when the last few bullets are settling, and then dodge in bottom center, there is a large enough gap
4th wave
similar to third wave, except gap at bottom center is smaller
5th wave
sit on top of Yukari, when the wave starts to move, go unfocused and circle around in a clockwise spiral:
up, right, down down, left left left, up, swinging around the wall of bullets