This game is really easy - if you are fast. I completed 1/3 of the stages in less then 2 min. and 1/3 in less then 1 min. Forget about magic it will only slow you down. Don't worry about defence just attack all the time and you will crush the opponent. Take the building next to you and then go for towers and the enemy - fast and hard. I completed this game at level 25.
I have played this game on another site. I am level 170 (total score: 2.292.603. Monsters killed: 334.341. Battle amulets: 1535. Journey amulets: 29. Victory amulets: 40. Shrine burst: 368). At that level it becomes quite boring... It is too easy.