Ranker Beta 1.2.3.2's permission nodes were left out during PEX testing.
Ranker Beta 1.2.4 Now fixed. Ranker should be working properly to include/exclude normal players from calling messages and commands via permission nodes:
ranker.message.rankup
ranker.message.rankdown
ranker.command.rankup
ranker.command.rankdown
To include/exclude operators from calling messages and commands use:
/ranker general.operator false
No commands to modify player stats yet.
No way to adjust the performance of Ranker for high/low density servers