We all fix all the mount system and simplify the leveling up process in 3.2 And all the mount casting time was decreased to 1.5s.Here's the specific plan

Apprentice Riding（75skill）
60% on the ground
Level required20
Cost：4G
Mount price：1G

Journeyman Riding（150skill）
100%on the ground
Level required40
Cost：50G
Mount price：10G

Expert Riding (225skill)
150%when flying，60%on the ground
Level required60
Cost：600G（discounts applied）
Mount price：50G

Artisan Riding（300skill）
280%when flying，100%on the ground
Level required70
Cost：5000G（discounts applied）
Mount price：50G