Are you gonna give it a whirl
Simian Spirit Guide for example, enabled many degenerate combos to achieve their goals a turn faster and allowed players to cast a turn two Blood Moon or a turn one Chalice of the Void before being banned from Modern
Combo decks and casual builds often show up in Commander, because you have a wide range of powerful spells, artifact cards, and ramp spells to experiment with
They will always include eight cards: five commons, two uncommons, and one rare or mythic rare card
In my extensive testing I have found the mirror to mostly be about getting ahead and staying ahead
If you know you are going for the complete set of Mythics, there's an argument to wait to open everything just once, at the Mythic Point