TOURNAMENT TROUBLES!

Well, as an option, after you hire the last possible hero and he completes his turn, you can save and send your save file to the host... This will be your result... And what ELSE can be done here without violating the rules? Only optimize movement so that there are enough heroes... And we all already know how to do that... :)

He probably meant whether it is possible to hire a dismissed hero, BUT NOT ON THE SAME DAY, BUT ON THE NEXT DAY :) Look at how the restrictions change from tournament to tournament :)
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the third stage of Kanigem - a ban from VDV:
7. It is forbidden: to buy back your dismissed heroes on the same day (i.e., to use the "dismissal-buyback" trick);
it is also forbidden to buy heroes who died in battle (do not confuse with those who fled)!
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blitz tournaments - a ban from AmberSoler and Kyle
- it is forbidden to use the "dismissal-buyback" trick, i.e., a dismissed Hero cannot be hired
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So, interpret it as you like :) Although these tournaments are played with one version of heroes.
This ban was justified by the fact that a dismissed hero will fully restore his turn, as far as I understand, and it turns out that on the same day he will have a full turn again. But on what basis can I not buy a hero on the current turn who was dismissed on the previous turn???
He would have a full turn anyway, whether he was with me on the previous turn and was dismissed, or whether he was not with me at all on the previous turn. According to AmberSoler, it works 100% - which means it's a feature. Therefore, the ban from VDV is formulated correctly, and yours is not very well. Well, what can you do, the boss is the boss :)