I often can't decide which deck to play, so I combine every deck together.
Since every deck effect is a small buff, they will sum to a huge buff, so I make ante scale faster, but still needs more balance test.
(The way Abandoned, Checkered and Erratic combine is, 40 cards randomly chosen from A~10 of Spades/Hearts.)
(Magic, Nebula and Ghost deck combined will cause you have 3 consumable in 2 slots on start. This is intended. Notice The Fool doesn't function in this overfill situation.)
The mod is available at https://github.com/WYXkk/BalatroMods, the 'MixtureDeck' folder. Requires Steamodded to play.