Alternatively, one component of a superintelligence that makes it super might be a tiered mind that's capable of processing far more input streams simultaneously to get around the core human inadequacy here, that we can only really focus on one thing at a time.

The same way we can build "muscle memory" to delegate simple autonomous tasks, a super intelligence might be able to dynamically delegate to human level (or greater) level sub intelligences to vigilantly watch everything it needs to.

I automatically assume this to be the case, but I guess a lot of people don't. They imagine ASI as something like "an extremely smart human", not "an entire civilization worth of intelligence, attention and effort".

One of the most intuitive pathway to ASI is that AGI eventually gets incredibly good at improving AGI. And a system like this would be able to craft and direct stripped down AI subsystems.