Eh, I guess I'll throw in some suggestions
Map: Cres - End time
URL: http://osu.ppy.sh/s/73474
BPM: 180
Difficulty: Another
Section of song to use: 1:15 to 1:38 It's a meh ending point, but if you want to keep it at 20~ seconds you can end it at a random stream finish like the 1:38 stream, doesn't matter
Length: 23 seconds
Map: Shiraishi - Shinsekai
URL: https://osu.ppy.sh/s/24634
BPM: 193
Difficulty: Insane
Section of song to use: 1:12 to 1:34
Length: 22 seconds
Map: TeamGrimoire+Amaneko - croiX
URL: http://osu.ppy.sh/s/67868
BPM: 195
Difficulty: exhaust
Section of song to use: 1:26 to 1:51 - I think starting on the 1:26 triple and ignoring the last spinner to keep it at a better time range would be the best idea.
Length: 25 seconds
Map: xi - time files
URL: http://osu.ppy.sh/s/49843
BPM: 200
Difficulty: Another
Section of song to use: start to 0:22 when the combo ends
Length: 22 seconds
Ascension to heaven is another good 200bpm stream map.
Obligatory:
Map: xi - freedom dive
URL: http://osu.ppy.sh/s/39804
BPM: 222
Difficulty: four dimensions
Section of song to use: 2:41 to 3:02 (ends really randomly)
Length: 21 seconds
You can use the part with streaming near the end of the another difficulty if you don't want to include a spaced deathstream map like four dimensions.
I'm awful at identifying good times for the section of song to use, but here are some suggestions.
Map: Cres - End time
URL: http://osu.ppy.sh/s/73474
BPM: 180
Difficulty: Another
Section of song to use: 1:15 to 1:38 It's a meh ending point, but if you want to keep it at 20~ seconds you can end it at a random stream finish like the 1:38 stream, doesn't matter
Length: 23 seconds
Map: Shiraishi - Shinsekai
URL: https://osu.ppy.sh/s/24634
BPM: 193
Difficulty: Insane
Section of song to use: 1:12 to 1:34
Length: 22 seconds
Map: TeamGrimoire+Amaneko - croiX
URL: http://osu.ppy.sh/s/67868
BPM: 195
Difficulty: exhaust
Section of song to use: 1:26 to 1:51 - I think starting on the 1:26 triple and ignoring the last spinner to keep it at a better time range would be the best idea.
Length: 25 seconds
Map: xi - time files
URL: http://osu.ppy.sh/s/49843
BPM: 200
Difficulty: Another
Section of song to use: start to 0:22 when the combo ends
Length: 22 seconds
Ascension to heaven is another good 200bpm stream map.
Obligatory:
Map: xi - freedom dive
URL: http://osu.ppy.sh/s/39804
BPM: 222
Difficulty: four dimensions
Section of song to use: 2:41 to 3:02 (ends really randomly)
Length: 21 seconds
You can use the part with streaming near the end of the another difficulty if you don't want to include a spaced deathstream map like four dimensions.
I'm awful at identifying good times for the section of song to use, but here are some suggestions.