Thread:CakeBuu/@comment-33272261-20180630022534/@comment-34799065-20180630030742

"Units are ranked from a general standpoint. The "usefulness" of a unit may vary from player to player based on their collection of units. Additionally, units are not just ranked by their damage output. Features like tanking and support for other cards are considered as well."

I get what you're saying, but the word 'optimal' is different for you and me. While there could be a card that is complete garbage for you, that same card could be a godsend. In other words, a 'optimal' card for them.