Melee ranking ...

Currently, all melee battles mix all weight classes.

All bots battles until there are 2000 battles in megabot ranking. 2000 is the sum of all pairings against nanobots to megabots.

But in nanobot rankings the sum of all nanobot pairings is still lower than 2000. Then all bots battles until there are 2000 battles in nanobot rankings. Which means the sum of all nanobot pairings is 2000, but all those battles in nanorumble still include megabots.

Almost no battles have 10 nanobots. A battle with 2 nanobots and 8 megabots also counts for nanorumble. And those 8 megabots affect the APS between the 2 nanos. Those 2 will be crushed before having the chance to interact with each other, the nano with worse movement profile being crushed first.

I was very strongly under the impression "but all those battles in nanorumble still include megabots" is not the way it is. Yes, the battles from when megabots are getting to 2000 score *are* still counted, but new battles made specially for the smaller league only include smaller league bots. At very least, that's how it used to be I believe.