I will let you know. For most of the game I used Droids, Engineer, Runemage and Giant. I got a bit tired of the game and tested Elfs and Lizards a bit. I have a savegame before my experiments I believe. There I have the old setup army.  
This will be my first finish on Impossible if I can make it. I play with minimal reloads (that is that I reload only if I misclick, I get attacked by something impossible at the moment I enter a map or something like that). I also might reload bosses. This makes mistakes costly and I often have to start at the beginning of the game again. Thats the way I like it. 
 
I have already restarted as Mage (the savegame in this post is Warrior) on Impossible. It was easier during the first battles, but after about 30 battles, I feel its getting more difficult than Warrior.
		 
		
		
		
		
		
		
		
		
	
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