I won't delve into a debate on this topic because I believe people are inherently decent.
By definition. Although I admit the possibility of all sorts of cunning moves, I can assure you that for a long time, all the regular players on the portal (and especially the members of clans) will be in the spotlight. And a sudden, strong performance by any player who has not previously shown much ambition can always be checked... To get lost among the competitors, there must be a very large number of them...
No one will ever play on two fronts for the sake of the clan's rating. A strong player will devote all their efforts primarily to their personal rating, and they will rather do an extra run on the map for themselves than for an abstract "nothing"... It is very difficult to make two strong, independent runs. And if one run is based on another, with the end of the game being replayed, it can be detected in two minutes. How? I think you know very well.
Can anyone tell me - is there a replay function in all versions of Heroes, or not? I don't remember - I rarely use it. I know there is one in the fourth game.
Joke: Vasil Ivanovich arrives in London in a tuxedo and with a suitcase full of money. Petka is very surprised - where did you get it? I played cards with gentlemen in London, Petka. And so what? Well, one of them says - sirs - I have a winning hand. And I say - let me see! Everyone was indignant - what are you doing! We are all gentlemen here - how can you? Petka - and so what? Well, from that moment on, my luck started to change :)
I'll say this for myself - I'm not Vasil, but I don't want to be in the place of the gentlemen either.