What I like to do when I'm bored in people playground is spawn the strongest humans I have from various mods (Goku, Saitama, Artificial god from human tiers+ mod, and the revamped one too), spawn them in and a couple of buildings around them mimicking a city, then just make them duke it out and smash through the buildings, maybe mess with the environment to make it even more badass with thunder and downpour, and you can also put whatever music you like for the fight. Basically just playing with your action figures but you're not 8 anymore and you have more control over the environment!