Yeah, the actual spam at the end is a stair, left to right, but inverted, so it's a huge chordmash. I couldn't believe I survived it, even on HP7, which is fairly lenient. Osu!mania is mostly way easier than LR2 (now HP numbers scale by the 0.1, so there's more options at the high end between HP10 and HP9, which is nice because HP10 is I think actually more difficult than hard guage (if not, it's close)), but even at that low HP I am not good at chordmashes. No wrist jack skill :<
Today I got a couple decent scores, and nearly beat my PB on this chart: BMS (Musical Masterpiece) - MANIERA [Insane]
(this is the THIRD hardest difficulty in this beatmap lol)
Also, I think this score was actually numerically better than my best IIRC, but it's got a lower score because of how combo breaks affect score (they effectively reduce the value of notes after a combo break, but allow you to slowly build back up by hitting the top 2 judgements, effectively meaning a score with misses clustered together suffers less than a score where they were spread across the whole song)
EDIT: above picture because visibility. I just replaced my midrange phone with a Galaxy S7 and can play rhythm games properly on it now, so I've started playing Deemo/Voez/Cytus, and just re-downloaded djmax technica q and o2jam u, because why not. Still suck at them though. Also, you should check out https://www.youtube.com/user/wasdx100
for some BMS autoplay videos and shit if you're ever interested in just looking at some charts and checking out the music. There's some cool stuff on there.