I can name one:
You will see that sysvars are grouped.
Like, movement sysvars are grouped 1 trough 6
Defense sysvars are grouped 820 trough 839.
This is not always the case. But this is the sysvar naming convention I am following. The mutator usually offsets a value rather then picking a new one. Hence the empty sysvars between sysvar groups serve there purpose on limiting really wild changes in robots behavior.
eh, never mind, I am repeating what has already been expressed. Sorry.
There is no rule on how far sysvar groups should be away from each other. That is true.