Player rating for tournaments across all installments of Heroes.

I believe a 3 to 7 ratio is optimal, but you don't think so. I'm open to hearing how you would balance them.
And the sixth stage is still a special case.

Any tournament is a special case, but these special cases create the overall picture.
Logically, the role of days should be greater in tournaments with large gaps in scores, while the role of placement should be greater for closely contested results. How many tournaments with large gaps have there been recently – only one, and how many with close results? Almost all the others, especially the 6th stage of the World Cup and the tournament for trios (where there will almost always be a close competition). It turns out that the role of placement should be key more often, purely based on practice. And therefore, the contribution for placement should be no less than for days, and it also greatly increases competitive interest.
Currently, I believe a 1 to 1 ratio is optimal. Moreover, with the development of the portal (i.e., the accumulation of tournament experience by its participants), the results will only become closer, especially in the leading group. Otherwise, we might have to allocate 70% of the rating to placement.