First of all, it's quite easy to calculate how many creatures a specialized hero should have.

After clearing something, you can either merge them or remove them from the army. Within a single day, saving won't help, although it's still being requested.

Some nonsense, sorry, about canceling weekly creatures and suspecting the opponent of joining.

Regarding the nonsense – this only applies to serious tournaments. An inexperienced player will lose anyway, and a victory will raise suspicion. And experienced players won't do that anyway.
But the main point here is different: the task was to solve a problem that might exist. Solutions to it have been proposed. If everything is going smoothly, then there is no problem, and then the stated task is incorrect. That's all.