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Here is the first example of a mismatch — the Champion. 1500 and 2 wood would be enough for him, as he's quite weak and asks for too much;
The opposite example (though from memory) is the Crusaders — they were buffed with more HP, but the price remained the same, and by the way, their growth was increased, just saying =) Crusaders are a very profitable Life product :D
And Monks are useless without accuracy.
P.S. keeping the discussion going) by the way, the Dragon King asks for more than he's actually worth; on one hand, he has 1000 HP and an attack stronger than Black Dragons, and you can cast positive spells on him, while he costs the same as a Black Dragon, but on the other hand — his attack can roast half of his own army, especially if Berserk is cast on him :D , so it's not immediately obvious whether he's expensive or cheap)
The opposite example (though from memory) is the Crusaders — they were buffed with more HP, but the price remained the same, and by the way, their growth was increased, just saying =) Crusaders are a very profitable Life product :D
And Monks are useless without accuracy.
P.S. keeping the discussion going) by the way, the Dragon King asks for more than he's actually worth; on one hand, he has 1000 HP and an attack stronger than Black Dragons, and you can cast positive spells on him, while he costs the same as a Black Dragon, but on the other hand — his attack can roast half of his own army, especially if Berserk is cast on him :D , so it's not immediately obvious whether he's expensive or cheap)