There is a good amounth of AR8 8'5 maps to play.
I guess any good player should be able to read from 7 to 10'3.
Anything else under or over it's more a preference than anything you will have to face offten.
Worst osu player effort/reward.
Sightreading Pass:
9/08/2018 The Big Black
10/08/2018 Lia - The Never Ending Love (DJ Shimamura's XTC Remix)
10/08/2018 Team.NEKOKAN - Airman ga Taosenai - Blown by the wind
13/08/2018 Camellia - Insecticide - [Arles AR10]
13/08/2018 GYZE - HONESTY
20/08/2018 Seiryu - AO-Infinity