The biggest problem with placing FL scores in order is that playing long FL songs and playing FL at high bpm are very different. A great HD+FL score is memorizing
more, but playing FL fast requires lots of focus and you have to recollect your memories a lot faster, and at times it can be like playing invisible, it requires more muscle memory as well. I can only give a rough estimate of where I would place them based on what I know, but I will try to explain my reasoning for each one.
rrtyui - Neuronecia (FL): It's a very tricky new-age style map, that most people can't play well without FL. Long and has a high combo. The sliders make it more disorienting and require more focus since the view area is smaller while on sliders, giving it a much faster feel. On the other hand, he didn't use HD so he isn't hitting invisible, which makes it a bit less disorienting on some parts, but a lot of times he's jumping into the abyss without being able to react anyway. Definitely a very hard map to flashlight, but some of it is because of the tricky mapping style not many people can play well. Overall, it is one the best FL plays, just not in every department.
Ekoro - Calamity Fortune (HD+FL): AR9 is slightly on the low side for this map, and when paired with HD, you're going to get quite a few invisible notes. The streams for the first 3/4ths in the map aren't too bad though since they're readable, making the stream section in the middle really easy. Toward the end, however, they're more spaced so Ekoro actually had to remember the path of the streams. Jumps aren't too big which makes muscle memory easier, but they're big enough to ne invisible with hidden.
Startrick - M@STERPIECE (DT+FL): Definitely one of the best FL scores, but I feel like it's unfair since it's Startrick's own map. I don't feel like adding hidden on this would have made a significant difference because there's a lot of large jumps that require you to jump into the abyss to hit, paired with a max combo of over 1300.
Mesita - Emotional Skyscraper ~ World's End (HD+FL): A 6 minute map with a little over 2000 combo, and HD on top of it. Not only this, but the map has quite a few jumps. A lot of the jumps seem invisible/barely see-able. The speed of the map is pretty consistent, so the only thing giving you a break to focus is the longer streams and maybe triples pretty much. Even though this definitely isn't the most impressive FL play due to how sloppy it is, it may have taken more memorization than any other FL score for a full combo.
FGSky - JoJo Sono Chi no Kioku~end of THE WORLD~ (EZ+FL): I can't evaluate this properly because of the effect of EZ mod. It makes it look even more ridiculous, even though it was probably easier to do with the EZ mod. Unfortunately, I don't think this score can be listed since it's not a top 100 score.
Ekoro - Revolution Deathsquad (EZ+FL): Most players find EZ disorienting, but reading for FL is very different, and I believe for someone like Ekoro, actually made this FL play drastically easier with the circle size. However, it's over a massive 3,400 combo and almost 8 minutes long. It's pretty easy to find something that uses a consistent mapping style and same mapper to seem a bit repetitive for memorization as well, since it would be much easier to memorize if it was a collab or something and every section seemed like it had a different style. Most of it is actually (somewhat) readable streams, however, which is why it's not the most godly FL play of all time; the streamy section was probably the easiest part for FL. Since the streams are readable, it gives you much more time to remember what's next, as well. Definitely a high amount of memorization required, but don't be fooled by it's combo, I wouldn't put it above scores like Neuronecia, Gold Dust, etc. despite the massive combo difference. I'm putting this here to try and explain why this score shouldn't be off-the-charts, though it should still be pretty high up there for sure.
Mesita - Gold Dust (HD+FL): I honestly always thought this score was sketchy because of how perfectly Mesita plays it, but I'll give him the benefit of the doubt. Can barely see any notes since it's so jumpy. Creative jump patterns make it easier to remember (not that this should factor into your score calculation).
Dungeon - World End (DT+FL): Don't let the low combo and lack of HD fool you, this is one of the best FL plays out there, due to the speed of the map. At this speed, I don't think HD would have made much of a difference.
Lybydose - Dance Dance Revolution NON STOP MEGAMIX (FL):
thregium - paraparaMAX I (FL): ...I guess it's possible since most of the notes are pretty close together...
takeki3gou - Symphonic Love (HD+DT+FL): Pretty fast map, making it intense with FL. One of the best FL scores because of the accuracy, but mostly because he memorized it to the point of being able to focus on accuracy. I'm pretty sure it was so ingrained in his muscle memory, he could play through the map without looking at the screen.
Bikko - JUMPER (HD+HR+FL):
NerO - Hoshizora no Ima (HD+FL):
ExGon - U.N. Owen Was Her? (HD+FL):
Mesita - masterpiece (HD+FL): I thought he would be hitting invisible a lot in this play since it was AR8 with HD. There was quite a bit of invisible jumps, but fortunately for Mesita most of the jumps were too small to have invisible notes, and the hardest part of squares loops each square twice so you can see them with hidden. The map is creative which probably helped the memorization process. A great FL play, just not as great as you'd imagine it to be.
Mesita - Kiss Shite Agenai (DT+FL): Pretty much exactly what I said for Dungeon's World End score, but not quite as good.
-GN - Shoreline (HD+DT+FL):
Rucker - Justice to Believe (DT+FL):
-GN - Suklaapallit (HD+HR+DT+FL):
Startrick - Be My Friend (HD+DT+FL):
KeigoClear - Ascension to Heaven (HD+HR+FL):
Other notable FL plays:
those - artcore JINJA (HD+FL):
takeki3gou - Piste SMILE Non-stop!! (HD+HR+FL):
Ekoro/ExGon/FGSky - Granat (HD+FL):
CheEZ - Heartbreaker (HD+DT+FL): I wanted to include this score because it's a prime example of when FL and HD turns an easy map into a very hard one; so many invisible notes in this FL score.
BinJip - My Sweet Lady (Short Ver.) (HD+DT+FL):
cptnXn - Mezame (FL):
Incomplete, got lazy and tired will fix it later
OsuSkills is nice