Maybe just some kind of mirror match against your own team could work.
The 20 seasons in a day stuff definitely would help a lot to find some problems regarding the balancing of the game
Größter Knecht aller Zeiten aka His Excellency aka President for Life aka Field Marshal Al Hadji aka Lord of All the Beasts of the Earth and Fishes of the Seas aka aka Conqueror of the Buzzerbeater Empire in Europe in General and Austria in Particular