Stick with training called shot alba i think its scaling is extremely sharp. sorta like this

level 1 being 1-3%
level 2 being 3-6%
level 3 being 6-9%
level 4 being 9-12%
level 5 being 12-15%
level 6 being 15-18%
level 7 being 18-21 %
level 8 being 21-35%
level 9 being 40-50%
level 10 being 90-95%

it really doesent feel like there are any trains in it at all until level 8 or so.