You can force to spend more time on read each single slidder start AR circle and practice to read those patterns very clearly. You start get faster after practice and time. Use Halftime mod to practice.
Or you can play them without read by listening music and tapping the whole pattern to the music as it is a stream and letting coordination and peripherical vision aim for you. (I feel more confortable this way, need spend less time to play hardest patterns)
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
use a simplistic skin and treat the super fast sliders the same way you would treat hitcircles. One tap and on to the next object. You don't actually need to hold them.