I really don't think the rating system is that important. There are definitely some odd choices you have to make, like scoring its combo potential or dealing with poor matchups. Lich I have rated as overpowered, but actually has a poor matchup against stall, the most overpowered army, but Lich is otherwise overpowered in any non-stall situation.

Your grand meme response to this will probably be something about how unsolvable that is, while I will just say, thanks grand for the nuance.