I maintain the opinion that by default, for choosing heroes and for rebuilding the Mage Guild, the standard HeroesWorld rules should apply.
And those who want to play with random heroes can agree otherwise among themselves...
As an option — make a list of such players in advance, and if they meet in the Tournament, they play random against each other.
....
Or here's a compromise option: the random starting heroes begin at the quarterfinal stage.
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