All graveyard based mutation decks are slow, and schrodinger's cat as the fuel makes it even more so. They are generally used for False Gods with Stall.
Drop Cats and use Otyughs, Fire Storms, Bone Wall etc works nicely. +Quintessence to protect a druid and the otyugh. Preferably the deck would be bigger with hourglasses and an eternity in that case. It's still slow, but has the defence to take down an FG with a good winrate.
If your not facing FGs, drop cats, boneyards and several towers, and replace with free creatures to get fast mutants.
Take a look round the deck section for a better idea on how these work.