The cap increase which doubles each level is too much. The level difficulty increase seems to increase very slowly, thus reaching levels too easily while your bot level is slow. Would like the levels made harder and scaled, so each level means something.
Here's a tip for beating the first castle and map: Focus 70/30 on using the chest increasing your army size instead of taking the gold. Focus on capping the 2 different types of archers (I had 15 each at castle attack) and the battle will be easier without ghosts (I killed off all my weak army but I turned out I didn't have ghosts, I still won).
The Beast boss(the very last, 375k hp?) is easily killable with fully upgraded tank + trial by fire spell. Don't even need pots, just heal your tank and kill him.
Seems too easy for the majority of the levels, just a grind mostly, needs character xp / leveling to make it less tedious. Crafting materials drop way too often considering you only need a few to make the top item. I completed it with just crafted items with vampirsm on them, most was pretty easy, just the length it took to do them.
I am really sorry