Posting that starting save would be nice 

As for your suggestion that pet dragon get 2nd lvl of chest on 21 is wrong. Some of his skills have limitations (mystic egg can get 70% hero leadership after 15th lvl pet, or pet wall can get 600hp upgrade only after 10th lvl pet), for number of chests/or rage cost reduction  there is no limitations for pet lvl at all.
	Quote:
	
	
		
			
				  digger { 
    hinthead=pet_digger_name 
    class=scripted 
    script_calccells=calccells_digger 
    script_attack=pet_digger 
    attack_cursor=magicstick 
    place=2 
    level=2 
    default=level1 
    upgrade { 
      level1=level:0/green:1,red:0,rage:4,rest:1,exp:5,level:1 
      level2=level:1/green:2,red:0,rage:+2,exp:+3,level:2 
      level3=level:2/green:2,red:1,rage:+3,exp:+4,level:3 
      level4=level:3/green:3,red:2,rage:+4,exp:+5,level:4 
      level5=level:4/green:4,red:2,rage:+3,exp:+8,level:5 
      rage1=level:>0,rs:0,rage:>9/rage:-5,rs:1       
    }
			
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 This is original game settings, i think for DotC and CotA they are same, only difference is maybe exp gain connected to strenght of enemy army and starting difficulty.