Player rating for tournaments across all installments of Heroes.

Sage! I'll take the third one, maybe even the first. What will you take? I won't be able to handle more. I need to manage two systems simultaneously. Which system will you choose? I can't decide yet, so I'll figure it out in practice.

Finally, I got to HW today. I guess I'll have to take everything else, because, besides us, there are no other people who want to calculate the rating yet.
P.S. I'm still thinking about which system to use. Maybe I'll do the same as you: I'll figure it out in practice.