Use the following trick to farm experience, Faction experience, and Koins, as well as practice Brutalities. This requires two controllers. Go to "Two Player", and "Kustom Kombat". Select the desired fighters then choose "Modifiers". Two of them need to be "Brutality Kombat" and "Dizzy Fatality Kombat". The other two should be Mods that do not throw random things (such as rockets, falling heads, etc.), for example, "Infinite Time" and "Super Meter". Dizzy Fatality Kombat causes both players to randomly become dizzy, and the opponent can perform their fatality at that time to end the match. Brutality Kombat eliminates the requirements to perform Brutalities. Because of this, a Brutality can be performed at any time, ending the match resulting in instant finish, a flawless victory, and bonuses. You can adjust your Kombat Kard to add more bonuses for when you perform the Brutality. Repeat the process as many times as desired.
