THIS IS MY FIRST SHOT AT EoSD EXTRA EVERRR
I am doing things wrong. How do I know? I am Mister Sanity, and by association, I do things wrong.
Please advice on how do.
The first two attacks are pure streaming. Learn how to collect the Power items here without bombing. The attack after that is more a test of how well you can keep up with the enemy appearances - ReimuB can knock the fairies out pretty quickly. Then the one after that is dodging randomly-oriented patterns, not much advice I can give other than learning how to read it.
The trick for "Silent Selene" is staying under Patchouli. You need to read the layout of the teal bullets to see where she moved to. "Royal Flare" is completely static, so memorize the pattern. Since you also use ReimuB, I recommend going through it the same way as I do in
this replay. I actually don't know if anything in "Philosopher's Stone" is aimed - maybe the blue ones, but I know the others aren't. Whether or not anything is aimed, most of it is just dodging.
More streaming for the next two attacks. Again, don't use bombs here - you might need them to survive on Flandre. The books fire a mix of aimed and random shots, but it's mostly dodging anyway. Then one last streaming attack to end the stage portion.
As you probably haven't seen much of Flandre, I don't want to spoil too much of her fight. I'll just do the first two cards. "Cranberry Trap" alternates between pink bullets that travel to the center of the screen (these are static) and blue ones that are aimed at your position. Thus, it can be roughly memorized. During "Laevatein", you might notice that a safespot appears above Flandre's head after she swings her sword on some waves (I stress "after"). Go up there to avoid the harder waves (see my replay above, or pretty much any vid of EoSD Extra on Youtube).