As fun as the game is, level 20 is nearly impossible to get brilliant in, especially the starry version. You can get max level by around level 16. When you added the extra 6 levels you didn't adapt the game well to accommodate the update. You have to rely solely on luck if you want brilliants on level 20. A STRATEGY game should not have to rely on luck it should rely on god damn strategy. You need to either change the procs around a bit, add more rank levels and skills, or make a few adjustments to that map or the enemies.