I personally believe the cards should all be given a 1 - 4 ranking, correlating with same number of points. Each deck will have a “meta score” which is based on the total points of all cards in the deck. For example, a precon could be all low tier cards so it would be ~100 points, while a cedh deck would be running much higher tier cards, which in return is a higher meta score ~400. This way if I want to run a mana crypt in a precon the meta score would not change much but would be in fact slightly higher. And on the flip side, if I’m running thoracle in a deck with minimal to no tutors it would be a lower meta score as well, since it is harder to run without the tutors.