The maximum level a hero can attain is 80. Unlike standard games, hero skill points are not granted upon every level. Every odd level until 21, a skill point is awarded. Then until level 45 skill points are awarded every 3 levels; after level 45 a skill point is given every 5 levels.
This is Quoted from EOTA:Twilights wiki, My question is i want a system somwhat like this. Does anyone know how it is done?