Most pianists manage to design a practice regimen which enables them to practice a variety of skills each day without having to spend more than an hour on technique. This can comprise exercises like Hanon or Dohnanji or Cortot for finger individualisation - , scales , and studies ranging from Czerny and Clementi through to Chopin and Liszt, who’s studies are frequently performed in public. Many professional antique piano spend an hour or more daily on technique as such. I am working on Debussys Dr Gradus from the Childrens Corner. I cant know for certain, but I am sure that Holosync meditation from Centerpointe has made the difference.