As you know, the Maus a huge cannon and takes ~8 secs to reload, making it an easy target for tanks with a faster reload and more powerful gun such as the Leopard 2 AND making the Maus unable to fight back in time. I suggest we change it to 6 secs to give people in the Maus a chance to fight back.
The longer reload is more realistic though
considering how insanely powerful the shots are i think 8 seconds is fine
plus ramming is an option too