Easier difficulty maps (recommended for toptime farmers):

Zebra volume 1 - Unseen Nature (Video)
Darmos volume 6 - Sadness Disease (Video)
norbi volume 5 - Empathy (Video)
Tarin feat PolakMaly feat Kucky - Azure Roses (Video is not available)
BriaN volume 14 - Mustang (Video)
SlowSheep volume 4 - Rush Hour (Video)
CooN feat 3ventic - Thunder (Video)
Darius volume 2 - Simplicity (Video)
ClaudiO volume 3 - Kingdom of Heaven (Video)
Vortex volume 9 - New Era (Video)

Medium difficulty maps (recommended for both speed and skill lovers):

SebaS volume 14 - Revolution (Video)
Vortex volume 13 - Dissimilarity (Video)
NitroN feat Sealine - Impel Down (Video)
Naval volume 9 - Naval's Evolving (Video)
FakeDeath volume 8 - Speed Run III (Video)
Ron1 volume 3 - Crush (Video)
Packy feat ReazZon - Conspiration II (Video)
Jackob volume 4 - Halo (Video)
Skaarj volume 11 - Falling Feathers (Video)
Kiwi volume 9 - Space Groove (Video)

Harder difficulty maps (recommended for lovers of skilled maps):

Gus volume 7 - Needed Skill (Video)
BriaN feat Mower feat SleepY - Dope 2 Drop (Video)
Andershell volume 4 - Pure Skills Paradise (Video)
PAwlo - Egyptian Skills II (Video)
FiNN feat [B]oost - Unbeatable Area (Video)
AbodyRulez volume 6 - Seven Deaths (Video)
KnOwN volume 12 - Metronome (Video)
Quantum volume 2 - Time 2 Shine (Video)
AbodyRulez feat Andershell feat Micra - Dark Skills Paradise (Video)
Cookie feat Corrupt - Inner Fury II (Video)
Easier difficulty maps:
Brian v17 -  An Alone Soul II
Norbi vol4 - Untried II
Coon vol1 -  Serenity
Cookie v10 - Canyons of Glory
Gus v10 - Escaping
Naval v10 - Eagerness
Norbi ft Andro - Untried III
Tomas ft. Gerc - Gradually
Nitron ft. Sealine - Impel Down

Medium difficulty maps:
Delete v12 - Restoration
DC v15 - Fuck You All III
Horus v3 - Emperor of The Cosmos
Gus v7 - Needed Skill
Kiwi v8 - Digital Universe II
Delete ft. Aisen - Neverland
Rampage v4 - Myth
Deadline ft. Lx - Tropica
Nice v9 - Just A Dream
Lx v3 - Tropical Pain II
Deadline ft. Pixel ft. Sk2 ft. ShockWave - Celestial Places
Packy - City of Dreams

Harder difficulty maps:
Andershell v5 - Pure Skills Paradise II
Brian ft. Gus ft. Symon  - Deep Power Paradise IV
Packy vol13 - Defiance
Andershell ft. Micra - Need For Skill II
Brian - Brutalism
ShockWave v8 - Unholy Realms
Packy ft. Cezika ft. Spectrum - Falling Down II
Brian v13 - We Love Skills II
Brian ft. Mower ft. SleepY - Dope 2 Drop
Kamen - An Improved Shit
DK vol7 - For Mother Fucker Skills
Iwanator v9 - Unique Skills
Easier difficulty maps:
Difference Threshold
New Island
Running is my life IV

Medium difficulty maps:
Detrimental Depth 2
Fear in the valley
C3z!ka v10

Harder difficulty maps:
Descendant's skills IV
Surface 2
Zidra Skillz