On the once side making it live makes sense.
But on the other side it would make it hard for people to follow and vote.
I have though a nice counter offer.
It is live but in bunches of map creators.
Lets say we have 12 contestants
you make 3 rounds of 4 (which the participate live at the same time) Each round takes place one after the other.
The 3 winners then make a final round for the winner!
This way it is live but not all contestants at the same time.
then if it is 4 contestants at each round. We can make a video with split screen sawing all 4 at the same time!
Unfortunately, I haven't set up a stream so I do not think I will manage to join on this.
I will try though to set up stream/map editor :-D If I manage I will try too ;-)