Further to my previous post:

Admin duty should be like jury duty and the tools should be extra easy to use, so that anyone in an instance could do it.

Then you'd set up a desired "council" size, say soemthing like 30 people, and have pool change by one person every day, so that no one ever has to lose their free time to doing admin work...

(plus then, it would be self-balancing...content moderation would actually be the product of the entire instance, so more homogenous in the end...)