Is there a system here?
It seems like there isnt any rhyme nor reason behind classes, besides the highest hp.
Is there some sort of rock paper scissors system that im missing? Sword > Pike > Bow > Sword or something? I have no idea how to counter enemies. Or do you just spend money on the "better" unit? In that case there just isn't any real strategy to this game. Besides the stat point thing.
And you don't get any more money per upgrade point you give to your units, I'm not talking about class changes, I'm talking upgrade points, so there really isn't any strategic investment involved. Its just, buy the best one, if you don't you loose, that is the game.