Its in the nature of the game that a strategy cant be optimal for both players
I think there might also be an option for a five-color turbo Ad Nauseam deck in cEDH featuring Food Chain lines and the other usual suspects for turbo win conditions
Packs with multiple rare cards do come up, but for the drop rate, take this update from Mark Rosewater
These are not necessarily stronger than other rarities (although they can be) when it comes to the card game, but they are harder to come by when opening packs
Possessing an Ability that could trade one card for two, an attack that swept the entire field, and a GX ability to turn the tables, Zoroark truly did it all
Personally, Im just pleased that we now have these unique cards included in Magic again, as they really add to the meta-lore of the game