I realize that this sounds a lot like unfair combo decks but the difference is that the mana an unfair combo generates is temporary to produce an instant win where Ramp's advantage is turned into permanents
Grist is a solid midrange Planeswalker that serves as a way to kill opposing threats and flood the board with tokens
Its at least a 7/7 but often much larger in a 4-person Commander game
However, you can still activate his planewalker abilities to either give all ninjas +1/+1, surveil twice, or tap a target creature and stun it for two turns
Playing Miirym without the backup in hand is taking a turn off, and wasting it
On the web site, you can choose the best ready-made solutions, and if your cards are too big for the sleeves, you can always change the protection size and get exactly what you need