1. Technical expertise is not a requirement the moderator of moderators. They provide an oversight view of the "civility" of moderator responses, which we all hope the moderators display. Acknowledgement of issues and processes for de/escalation, in view of AWF/ and incident log / action I would expect need some fleshing out.
2. The 24 hr cycle would suggest to me you really need two such moderator of moderators from 2 very different locations - if the timeliness of responses is of key concern. It also has the benefit of providing fall-back as a single chosen moderator of moderators may not always be in a position to provide their services 7 days a week. Also perhaps, given the ages of some of us, we need a fall back !
3. To be clear, would the moderator of moderators be able to participate in forum discussion - technical or otherwise - and if allowed would they participate under a separate member account (where they would presumably make their usual contributions to the site)? Conversations of mod of mods to mods would unlikely be visible? The mod of mods is a member of AWF - and so I presume wants to continue contributing.
4. Everyone has bias. An ability to rise above personal viewpoints and consider, respect and fairly evaluate the viewpoints/sensitivities of others is needed by mods and the mod of mods.