ABSOLUTE LEADER – who is he???

I don't understand why you're so worried. In my opinion, the one with the higher total rating should be the leader. If you play poorly, you won't be in contention for first place, IMHO.

But how do you account for the fact that, for example, Vasya_Pupkin comes to the portal and participates in a tournament, winning the last two stages, while almost always achieving the best result in mini-tournaments throughout the last two stages. I think that according to your system, he simply won't become a top player; he just won't have enough total points, hence the conclusion that the total score is detrimental to new and promising players.

Sincerely, K0Lb@zzeR.