I got a few replays for Flandre.
Land Scheme "Three Sacred Treasures - Country"The pattern is relatively simple and repeats multiple times. The tail end of each wave tends to get a bit tight near the bottom, so if you want you can tackle it a bit higher up (as shown) where there's more room.
Visionary Wave "Mind Blowing"As others have mentioned, you can stay in a spot in the center and move down with it. However, the spot closest to Reisen is a bit small, and takes some measure of control to pull off consistently, but is arguably the most rewarding as you hardly have to move horizontally. If you want to be on the safe side, you can use the spot right below that, which is noticeably bigger but forces you through waves at an angle. I use both spaces in the replay so you can see the difference.
Indolence "Mind Stopper"On the first wave, stay in the center and wait for the bullets to stop, then duck to the open spot in the center below you. Make sure you get back up to the middle of the screen (preferably more to one side as well) before the aimed shots start firing from the corners, and don't move until the bullets stop again. When you go down from here on out, you'll have to stay slightly to one side and then fit through the rings as they expand. Then you repeat from here. The main issue is making sure the aimed bullets don't go where you want to dodge the rings.
I also have a
perfect Stage 4B replay if you want to see how something is done. Three of Marisa's nonspells are memo, though the second might warrant a bomb in a full run because of how tight everything is.